421031091 has 32 divisors (see below), whose sum is σ = 623185920. Its totient is φ = 251193600.

The previous prime is 421031047. The next prime is 421031101. The reversal of 421031091 is 190130124.

It is not a de Polignac number, because 421031091 - 2⁷ = 421030963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421032091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 285486 + ... + 286956.

It is an arithmetic number, because the mean of its divisors is an integer number (19474560).

Almost surely, 2^421031091 is an apocalyptic number.

421031091 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

421031091 is a deficient number, since it is larger than the sum of its proper divisors (202154829).

421031091 is a wasteful number, since it uses less digits than its factorization.

421031091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 421031091 is about 20519.0421560072. The cubic root of 421031091 is about 749.4995719477.

The spelling of 421031091 in words is "four hundred twenty-one million, thirty-one thousand, ninety-one".