135508401 has 24 divisors (see below), whose sum is σ = 224550144. Its totient is φ = 77137920.

The previous prime is 135508391. The next prime is 135508423. The reversal of 135508401 is 104805531.

It is not a de Polignac number, because 135508401 - 2⁵ = 135508369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135508001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13105 + ... + 21041.

It is an arithmetic number, because the mean of its divisors is an integer number (9356256).

Almost surely, 2^135508401 is an apocalyptic number.

It is an amenable number.

135508401 is a deficient number, since it is larger than the sum of its proper divisors (89041743).

135508401 is a wasteful number, since it uses less digits than its factorization.

135508401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8221 (or 8218 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 135508401 is about 11640.8075750783. The cubic root of 135508401 is about 513.6359428546.

It can be divided in two parts, 135 and 508401, that added together give a triangular number (508536 = T₁₀₀₈).

The spelling of 135508401 in words is "one hundred thirty-five million, five hundred eight thousand, four hundred one".