625405 has 16 divisors (see below), whose sum is σ = 834624. Its totient is φ = 446080.

The previous prime is 625397. The next prime is 625409. The reversal of 625405 is 504526.

It is not a de Polignac number, because 625405 - 2³ = 625397 is a prime.

It is a super-2 number, since 2×625405² = 782262828050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625409) 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, 4497 + ... + 4633.

It is an arithmetic number, because the mean of its divisors is an integer number (52164).

2⁶²⁵⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

625405 is a deficient number, since it is larger than the sum of its proper divisors (209219).

625405 is a wasteful number, since it uses less digits than its factorization.

625405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 625405 is about 790.8255180506. The cubic root of 625405 is about 85.5172610865.

The spelling of 625405 in words is "six hundred twenty-five thousand, four hundred five".