131445402 has 16 divisors (see below), whose sum is σ = 286790112. Its totient is φ = 39831920.

The previous prime is 131445373. The next prime is 131445421. The reversal of 131445402 is 204544131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995733 + ... + 995864.

It is an arithmetic number, because the mean of its divisors is an integer number (17924382).

Almost surely, 2^131445402 is an apocalyptic number.

131445402 is an abundant number, since it is smaller than the sum of its proper divisors (155344710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131445402 is a wasteful number, since it uses less digits than its factorization.

131445402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991613.

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

The square root of 131445402 is about 11464.9641080991. The cubic root of 131445402 is about 508.4502512993.

Adding to 131445402 its reverse (204544131), we get a palindrome (335989533).

The spelling of 131445402 in words is "one hundred thirty-one million, four hundred forty-five thousand, four hundred two".