Number of the day: 645425

Properties of the number 645425:

645425 = 5² × 11 × 2347 is the 592950^th composite number and is not squarefree.
645425 has 3 distinct prime factors, 12 divisors, 19 antidivisors and 469200 totatives.
645425 has an emirpimes digit sum 26 in base 10.
645425 = 322713² - 322712² = 64545² - 64540² = 29343² - 29332² = 12921² - 12896² = 5895² - 5840² = 1311² - 1036² is the difference of 2 nonnegative squares in 6 ways.
645425 is the difference of 2 positive pentagonal numbers in 6 ways.
645425 = 14² + 45² + 802² is the sum of 3 positive squares.
645425² = 387255² + 516340² = 180719² + 619608² is the sum of 2 positive squares in 2 ways.
645425² is the sum of 3 positive squares.
645425 is a proper divisor of 1063⁶⁰ - 1.