672405 has 16 divisors (see below), whose sum is σ = 1123200. Its totient is φ = 342848.

The previous prime is 672379. The next prime is 672439. The reversal of 672405 is 504276.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 672405 - 2⁶ = 672341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630 + ... + 1319.

It is an arithmetic number, because the mean of its divisors is an integer number (70200).

2⁶⁷²⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

672405 is a deficient number, since it is larger than the sum of its proper divisors (450795).

672405 is a wasteful number, since it uses less digits than its factorization.

672405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 672405 is about 820.0030487748. The cubic root of 672405 is about 87.6079755462.

The spelling of 672405 in words is "six hundred seventy-two thousand, four hundred five".