402431145 has 16 divisors (see below), whose sum is σ = 653501760. Its totient is φ = 211425984.

The previous prime is 402431137. The next prime is 402431147. The reversal of 402431145 is 541134204.

It is not a de Polignac number, because 402431145 - 2³ = 402431137 is a prime.

It is a super-2 number, since 2×402431145² = 323901652932022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402431147) 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, 199210 + ... + 201219.

It is an arithmetic number, because the mean of its divisors is an integer number (40843860).

Almost surely, 2^402431145 is an apocalyptic number.

It is an amenable number.

402431145 is a deficient number, since it is larger than the sum of its proper divisors (251070615).

402431145 is a wasteful number, since it uses less digits than its factorization.

402431145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400504.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 402431145 is about 20060.6865535554. The cubic root of 402431145 is about 738.2960214771.

Adding to 402431145 its reverse (541134204), we get a palindrome (943565349).

The spelling of 402431145 in words is "four hundred two million, four hundred thirty-one thousand, one hundred forty-five".