Number of the day: 74981

Properties of the number 74981:

74981 = 97 × 773 is semiprime and squarefree.
74981 has 2 distinct prime factors, 4 divisors, 19 antidivisors and 74112 totatives.
74981 has a prime digit sum 29 in base 10.
74981 has a triangular digit product 2016 in base 10.
Reversing the decimal digits of 74981 results in a prime.
74981 = 37491² - 37490² = 435² - 338² is the difference of 2 nonnegative squares in 2 ways.
74981 is the difference of 2 positive pentagonal numbers in 2 ways.
74981 = 130² + 241² = 65² + 266² is the sum of 2 positive squares in 2 ways.
74981 = 6² + 31² + 272² is the sum of 3 positive squares.
74981² = 50245² + 55656² = 34580² + 66531² = 41181² + 62660² = 18915² + 72556² is the sum of 2 positive squares in 4 ways.
74981² is the sum of 3 positive squares.
74981 is a divisor of 1229⁴⁸ - 1.
74981 is an emirpimes in (at least) the following bases: 5, 13, 14, 15, 16, 19, 20, 34, 35, 36, 41, 43, 44, 45, 46, 47, 52, 54, 61, 67, 69, 71, 74, 75, 80, 81, 83, 88, 89, 91, 93, 99, and 100.
74981 is palindromic in (at least) the following bases: -20, and -85.
74981 in base 49 = VBB and consists of only the digits 'B' and 'V'.