131535121 has 2 divisors, whose sum is σ = 131535122. Its totient is φ = 131535120.

The previous prime is 131535113. The next prime is 131535133. The reversal of 131535121 is 121535131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131217025 + 318096 = 11455^2 + 564^2 .

It is an emirp because it is prime and its reverse (121535131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131535121 - 2³ = 131535113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131535092 and 131535101.

It is not a weakly prime, because it can be changed into another prime (131535101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65767560 + 65767561.

It is an arithmetic number, because the mean of its divisors is an integer number (65767561).

Almost surely, 2^131535121 is an apocalyptic number.

It is an amenable number.

131535121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131535121 is an equidigital number, since it uses as much as digits as its factorization.

131535121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 22.

The square root of 131535121 is about 11468.8761873167. The cubic root of 131535121 is about 508.5659071089.

The spelling of 131535121 in words is "one hundred thirty-one million, five hundred thirty-five thousand, one hundred twenty-one".