421825929 has 16 divisors (see below), whose sum is σ = 644247552. Its totient is φ = 240493968.

The previous prime is 421825927. The next prime is 421825939. The reversal of 421825929 is 929528124.

It is a happy number.

It is not a de Polignac number, because 421825929 - 2¹ = 421825927 is a prime.

It is a super-2 number, since 2×421825929² = 355874228753426082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421825927) 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, 13369 + ... + 31974.

It is an arithmetic number, because the mean of its divisors is an integer number (40265472).

Almost surely, 2^421825929 is an apocalyptic number.

It is an amenable number.

421825929 is a deficient number, since it is larger than the sum of its proper divisors (222421623).

421825929 is a wasteful number, since it uses less digits than its factorization.

421825929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45796.

The product of its digits is 103680, while the sum is 42.

The square root of 421825929 is about 20538.4013253223. The cubic root of 421825929 is about 749.9709197614.

The spelling of 421825929 in words is "four hundred twenty-one million, eight hundred twenty-five thousand, nine hundred twenty-nine".