624881 has 4 divisors (see below), whose sum is σ = 640164. Its totient is φ = 609600.

The previous prime is 624859. The next prime is 624917. The reversal of 624881 is 188426.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 234256 + 390625 = 484^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 624881 - 2¹⁴ = 608497 is a prime.

It is a super-2 number, since 2×624881² = 780952528322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (624851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7580 + ... + 7661.

It is an arithmetic number, because the mean of its divisors is an integer number (160041).

2⁶²⁴⁸⁸¹ is an apocalyptic number.

It is an amenable number.

624881 is a deficient number, since it is larger than the sum of its proper divisors (15283).

624881 is a wasteful number, since it uses less digits than its factorization.

624881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15282.

The product of its digits is 3072, while the sum is 29.

The square root of 624881 is about 790.4941492510. The cubic root of 624881 is about 85.4933706657.

The spelling of 624881 in words is "six hundred twenty-four thousand, eight hundred eighty-one".