135932281 has 9 divisors (see below), whose sum is σ = 138534223. Its totient is φ = 133378960.

The previous prime is 135932273. The next prime is 135932287. The reversal of 135932281 is 182239531.

The square root of 135932281 is 11659.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 26101881 + 109830400 = 5109^2 + 10480^2 .

It is not a de Polignac number, because 135932281 - 2³ = 135932273 is a prime.

It is a super-2 number, since 2×135932281² = 36955170035725922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135932287) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1037586 + ... + 1037716.

Almost surely, 2^135932281 is an apocalyptic number.

135932281 is the 11659-th square number.

135932281 is the 5830-th centered octagonal number.

It is an amenable number.

135932281 is a deficient number, since it is larger than the sum of its proper divisors (2601942).

135932281 is an frugal number, since it uses more digits than its factorization.

135932281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 220 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The cubic root of 135932281 is about 514.1709487557.

The spelling of 135932281 in words is "one hundred thirty-five million, nine hundred thirty-two thousand, two hundred eighty-one".