624481 has 12 divisors (see below), whose sum is σ = 741076. Its totient is φ = 522720.

The previous prime is 624479. The next prime is 624487. The reversal of 624481 is 184426.

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 379456 = 495^2 + 616^2 .

It is not a de Polignac number, because 624481 - 2¹ = 624479 is a prime.

It is a super-2 number, since 2×624481² = 779953038722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1375 + ... + 1771.

2⁶²⁴⁴⁸¹ is an apocalyptic number.

It is an amenable number.

624481 is a deficient number, since it is larger than the sum of its proper divisors (116595).

624481 is a wasteful number, since it uses less digits than its factorization.

624481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 421 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 624481 is about 790.2411024491. The cubic root of 624481 is about 85.4751247129.

The spelling of 624481 in words is "six hundred twenty-four thousand, four hundred eighty-one".