624641 has 4 divisors (see below), whose sum is σ = 634032. Its totient is φ = 615252.

The previous prime is 624607. The next prime is 624643. The reversal of 624641 is 146426.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 624641 - 2⁶ = 624577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (624643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4595 + ... + 4728.

It is an arithmetic number, because the mean of its divisors is an integer number (158508).

It is a Proth number, since it is equal to 305 ⋅ 2¹¹ + 1 and 305 < 2¹¹.

2⁶²⁴⁶⁴¹ is an apocalyptic number.

It is an amenable number.

624641 is a deficient number, since it is larger than the sum of its proper divisors (9391).

624641 is an equidigital number, since it uses as much as digits as its factorization.

624641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9390.

The product of its digits is 1152, while the sum is 23.

The square root of 624641 is about 790.3423308921. The cubic root of 624641 is about 85.4824240288.

The spelling of 624641 in words is "six hundred twenty-four thousand, six hundred forty-one".