135172401 has 32 divisors (see below), whose sum is σ = 225485568. Its totient is φ = 70122240.

The previous prime is 135172391. The next prime is 135172459. The reversal of 135172401 is 104271531.

It is not a de Polignac number, because 135172401 - 2⁶ = 135172337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135172501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12595 + ... + 20711.

It is an arithmetic number, because the mean of its divisors is an integer number (7046424).

Almost surely, 2^135172401 is an apocalyptic number.

It is an amenable number.

135172401 is a deficient number, since it is larger than the sum of its proper divisors (90313167).

135172401 is a wasteful number, since it uses less digits than its factorization.

135172401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8201.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 135172401 is about 11626.3666293473. The cubic root of 135172401 is about 513.2110626405.

The spelling of 135172401 in words is "one hundred thirty-five million, one hundred seventy-two thousand, four hundred one".