Number of the day: 701220

Properties of the number 701220:

701220 = 2² × 3 × 5 × 13 × 29 × 31 is the 644588^th composite number and is not squarefree.
701220 has 6 distinct prime factors, 96 divisors, 33 antidivisors and 161280 totatives.
701220 has an oblong digit sum 12 in base 10.
701220 is the difference of 2 nonnegative squares in 16 ways.
701220 is the difference of 2 positive pentagonal numbers in 5 ways.
701220 = 2² + 260² + 796² is the sum of 3 positive squares.
701220² = 420732² + 560976² = 116064² + 691548² = 82212² + 696384² = 373116² + 593712² = 172608² + 679644² = 343728² + 611196² = 356004² + 604128² = 191952² + 674436² = 158844² + 682992² = 282720² + 641700² = 269700² + 647280² = 251100² + 654720² = 483600² + 507780² is the sum of 2 positive squares in 13 ways.
701220² is the sum of 3 positive squares.
701220 is a divisor of 521⁶ - 1.

The number 701220 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequences (among others):

Sequence numbers and descriptions below are taken from OEIS.
A171259: Numbers n such that sigma(n) = 14*phi(n) (where sigma=A000203, phi=A000010).
A249065: Numbers n such that n = concatenate(a, b) and sigma(a) + sigma(b) = phi(n).