135251289 has 20 divisors (see below), whose sum is σ = 206346624. Its totient is φ = 88246584.

The previous prime is 135251287. The next prime is 135251321. The reversal of 135251289 is 982152531.

135251289 is a `hidden beast` number, since 1 + 3 + 525 + 128 + 9 = 666.

It is not a de Polignac number, because 135251289 - 2¹ = 135251287 is a prime.

It is a super-2 number, since 2×135251289² = 36585822352323042, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135251287) 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 in 19 ways as a sum of consecutive naturals, for example, 13957 + ... + 21570.

Almost surely, 2^135251289 is an apocalyptic number.

It is an amenable number.

135251289 is a deficient number, since it is larger than the sum of its proper divisors (71095335).

135251289 is an equidigital number, since it uses as much as digits as its factorization.

135251289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35586 (or 35577 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 135251289 is about 11629.7587679195. The cubic root of 135251289 is about 513.3108816383.

The spelling of 135251289 in words is "one hundred thirty-five million, two hundred fifty-one thousand, two hundred eighty-nine".