131252921 has 2 divisors, whose sum is σ = 131252922. Its totient is φ = 131252920.

The previous prime is 131252911. The next prime is 131252923. The reversal of 131252921 is 129252131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 5812921 = 11200^2 + 2411^2 .

It is a cyclic number.

It is not a de Polignac number, because 131252921 - 2¹⁴ = 131236537 is a prime.

Together with 131252923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131252923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65626460 + 65626461.

It is an arithmetic number, because the mean of its divisors is an integer number (65626461).

Almost surely, 2^131252921 is an apocalyptic number.

It is an amenable number.

131252921 is a deficient number, since it is larger than the sum of its proper divisors (1).

131252921 is an equidigital number, since it uses as much as digits as its factorization.

131252921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 131252921 is about 11456.5667195718. The cubic root of 131252921 is about 508.2019484033.

The spelling of 131252921 in words is "one hundred thirty-one million, two hundred fifty-two thousand, nine hundred twenty-one".