135146921 has 16 divisors (see below), whose sum is σ = 167349504. Its totient is φ = 106277184.

The previous prime is 135146917. The next prime is 135146929. The reversal of 135146921 is 129641531.

It is not a de Polignac number, because 135146921 - 2² = 135146917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135146929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10751 + ... + 19643.

It is an arithmetic number, because the mean of its divisors is an integer number (10459344).

Almost surely, 2^135146921 is an apocalyptic number.

It is an amenable number.

135146921 is a deficient number, since it is larger than the sum of its proper divisors (32202583).

135146921 is a wasteful number, since it uses less digits than its factorization.

135146921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9080.

The product of its digits is 6480, while the sum is 32.

The square root of 135146921 is about 11625.2707925450. The cubic root of 135146921 is about 513.1788138493.

The spelling of 135146921 in words is "one hundred thirty-five million, one hundred forty-six thousand, nine hundred twenty-one".