131421284 has 24 divisors (see below), whose sum is σ = 234057600. Its totient is φ = 64554560.

The previous prime is 131421281. The next prime is 131421289. The reversal of 131421284 is 482124131.

It is not an unprimeable number, because it can be changed into a prime (131421281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101312 + ... + 102600.

It is an arithmetic number, because the mean of its divisors is an integer number (9752400).

Almost surely, 2^131421284 is an apocalyptic number.

It is an amenable number.

131421284 is a deficient number, since it is larger than the sum of its proper divisors (102636316).

131421284 is a wasteful number, since it uses less digits than its factorization.

131421284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723 (or 1721 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 131421284 is about 11463.9122466983. The cubic root of 131421284 is about 508.4191520671.

The spelling of 131421284 in words is "one hundred thirty-one million, four hundred twenty-one thousand, two hundred eighty-four".