625651 has 16 divisors (see below), whose sum is σ = 756000. Its totient is φ = 511488.

The previous prime is 625643. The next prime is 625657. The reversal of 625651 is 156526.

It is a cyclic number.

It is not a de Polignac number, because 625651 - 2³ = 625643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4125 + ... + 4273.

It is an arithmetic number, because the mean of its divisors is an integer number (47250).

2⁶²⁵⁶⁵¹ is an apocalyptic number.

625651 is the 646-th pentagonal number.

625651 is a deficient number, since it is larger than the sum of its proper divisors (130349).

625651 is a wasteful number, since it uses less digits than its factorization.

625651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its digits is 1800, while the sum is 25.

The square root of 625651 is about 790.9810364351. The cubic root of 625651 is about 85.5284722155.

The spelling of 625651 in words is "six hundred twenty-five thousand, six hundred fifty-one".