135232621 has 2 divisors, whose sum is σ = 135232622. Its totient is φ = 135232620.

The previous prime is 135232613. The next prime is 135232631. The reversal of 135232621 is 126232531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131675625 + 3556996 = 11475^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 135232621 - 2³ = 135232613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135232631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67616310 + 67616311.

It is an arithmetic number, because the mean of its divisors is an integer number (67616311).

Almost surely, 2^135232621 is an apocalyptic number.

It is an amenable number.

135232621 is a deficient number, since it is larger than the sum of its proper divisors (1).

135232621 is an equidigital number, since it uses as much as digits as its factorization.

135232621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 135232621 is about 11628.9561440398. The cubic root of 135232621 is about 513.2872640484.

The spelling of 135232621 in words is "one hundred thirty-five million, two hundred thirty-two thousand, six hundred twenty-one".