625406 has 4 divisors (see below), whose sum is σ = 938112. Its totient is φ = 312702.

The previous prime is 625397. The next prime is 625409. The reversal of 625406 is 604526.

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

It is a super-2 number, since 2×625406² = 782265329672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625406.

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 as a sum of consecutive naturals, namely, 156350 + ... + 156353.

It is an arithmetic number, because the mean of its divisors is an integer number (234528).

2⁶²⁵⁴⁰⁶ is an apocalyptic number.

625406 is a deficient number, since it is larger than the sum of its proper divisors (312706).

625406 is a wasteful number, since it uses less digits than its factorization.

625406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312705.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 625406 is about 790.8261503011. The cubic root of 625406 is about 85.5173066661.

The spelling of 625406 in words is "six hundred twenty-five thousand, four hundred six".