131421245 has 16 divisors (see below), whose sum is σ = 163153920. Its totient is φ = 101520000.

The previous prime is 131421239. The next prime is 131421281. The reversal of 131421245 is 542124131.

It is not a de Polignac number, because 131421245 - 2⁴ = 131421229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131421245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115841 + ... + 116969.

It is an arithmetic number, because the mean of its divisors is an integer number (10197120).

Almost surely, 2^131421245 is an apocalyptic number.

It is an amenable number.

131421245 is a deficient number, since it is larger than the sum of its proper divisors (31732675).

131421245 is a wasteful number, since it uses less digits than its factorization.

131421245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916.

The product of its digits is 960, while the sum is 23.

The square root of 131421245 is about 11463.9105457082. The cubic root of 131421245 is about 508.4191017750.

Adding to 131421245 its reverse (542124131), we get a palindrome (673545376).

The spelling of 131421245 in words is "one hundred thirty-one million, four hundred twenty-one thousand, two hundred forty-five".