403131121 has 4 divisors (see below), whose sum is σ = 403389952. Its totient is φ = 402872292.

The previous prime is 403131089. The next prime is 403131133. The reversal of 403131121 is 121131304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 403131121 - 2⁵ = 403131089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403131095 and 403131104.

It is not an unprimeable number, because it can be changed into a prime (403131191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127065 + ... + 130198.

It is an arithmetic number, because the mean of its divisors is an integer number (100847488).

Almost surely, 2^403131121 is an apocalyptic number.

It is an amenable number.

403131121 is a deficient number, since it is larger than the sum of its proper divisors (258831).

403131121 is a wasteful number, since it uses less digits than its factorization.

403131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258830.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 403131121 is about 20078.1254354086. The cubic root of 403131121 is about 738.7238297804.

Adding to 403131121 its reverse (121131304), we get a palindrome (524262425).

The spelling of 403131121 in words is "four hundred three million, one hundred thirty-one thousand, one hundred twenty-one".