406925421 has 16 divisors (see below), whose sum is σ = 622815744. Its totient is φ = 231501744.

The previous prime is 406925401. The next prime is 406925501. The reversal of 406925421 is 124529604.

It is not a de Polignac number, because 406925421 - 2⁶ = 406925357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406925401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37915 + ... + 47448.

It is an arithmetic number, because the mean of its divisors is an integer number (38925984).

Almost surely, 2^406925421 is an apocalyptic number.

It is an amenable number.

406925421 is a deficient number, since it is larger than the sum of its proper divisors (215890323).

406925421 is a wasteful number, since it uses less digits than its factorization.

406925421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85600.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 406925421 is about 20172.3925452585. The cubic root of 406925421 is about 741.0342374465.

The spelling of 406925421 in words is "four hundred six million, nine hundred twenty-five thousand, four hundred twenty-one".