131421279 has 16 divisors (see below), whose sum is σ = 191352960. Its totient is φ = 79568160.

The previous prime is 131421239. The next prime is 131421281. The reversal of 131421279 is 972124131.

It is not a de Polignac number, because 131421279 - 2⁹ = 131420767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131421229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53817 + ... + 56205.

It is an arithmetic number, because the mean of its divisors is an integer number (11959560).

Almost surely, 2^131421279 is an apocalyptic number.

131421279 is a deficient number, since it is larger than the sum of its proper divisors (59931681).

131421279 is a wasteful number, since it uses less digits than its factorization.

131421279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070.

The product of its digits is 3024, while the sum is 30.

The square root of 131421279 is about 11463.9120286227. The cubic root of 131421279 is about 508.4191456194.

The spelling of 131421279 in words is "one hundred thirty-one million, four hundred twenty-one thousand, two hundred seventy-nine".