135425921 has 2 divisors, whose sum is σ = 135425922. Its totient is φ = 135425920.

The previous prime is 135425881. The next prime is 135425933. The reversal of 135425921 is 129524531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123454321 + 11971600 = 11111^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 135425921 - 2²⁶ = 68317057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135425221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67712960 + 67712961.

It is an arithmetic number, because the mean of its divisors is an integer number (67712961).

Almost surely, 2^135425921 is an apocalyptic number.

It is an amenable number.

135425921 is a deficient number, since it is larger than the sum of its proper divisors (1).

135425921 is an equidigital number, since it uses as much as digits as its factorization.

135425921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 135425921 is about 11637.2643262925. The cubic root of 135425921 is about 513.5317099792.

The spelling of 135425921 in words is "one hundred thirty-five million, four hundred twenty-five thousand, nine hundred twenty-one".