135291972 has 12 divisors (see below), whose sum is σ = 315681296. Its totient is φ = 45097320.

The previous prime is 135291907. The next prime is 135291973. The reversal of 135291972 is 279192531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 135291972.

It is not an unprimeable number, because it can be changed into a prime (135291973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5637154 + ... + 5637177.

Almost surely, 2^135291972 is an apocalyptic number.

135291972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135291972 is an abundant number, since it is smaller than the sum of its proper divisors (180389324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135291972 is a wasteful number, since it uses less digits than its factorization.

135291972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11274338 (or 11274336 counting only the distinct ones).

The product of its digits is 34020, while the sum is 39.

The square root of 135291972 is about 11631.5077268598. The cubic root of 135291972 is about 513.3623437063.

The spelling of 135291972 in words is "one hundred thirty-five million, two hundred ninety-one thousand, nine hundred seventy-two".