135413281 has 2 divisors, whose sum is σ = 135413282. Its totient is φ = 135413280.

The previous prime is 135413273. The next prime is 135413287. The reversal of 135413281 is 182314531.

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., 124523281 + 10890000 = 11159^2 + 3300^2 .

It is a cyclic number.

It is not a de Polignac number, because 135413281 - 2³ = 135413273 is a prime.

It is a super-2 number, since 2×135413281² = 36673513342369922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135413287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67706640 + 67706641.

It is an arithmetic number, because the mean of its divisors is an integer number (67706641).

Almost surely, 2^135413281 is an apocalyptic number.

It is an amenable number.

135413281 is a deficient number, since it is larger than the sum of its proper divisors (1).

135413281 is an equidigital number, since it uses as much as digits as its factorization.

135413281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 135413281 is about 11636.7212306560. The cubic root of 135413281 is about 513.5157326273.

The spelling of 135413281 in words is "one hundred thirty-five million, four hundred thirteen thousand, two hundred eighty-one".