135421539 has 32 divisors (see below), whose sum is σ = 208687104. Its totient is φ = 77304480.

The previous prime is 135421501. The next prime is 135421553. The reversal of 135421539 is 935124531.

It is not a de Polignac number, because 135421539 - 2⁷ = 135421411 is a prime.

It is a super-3 number, since 3×135421539³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (135421589) 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, 49522 + ... + 52184.

It is an arithmetic number, because the mean of its divisors is an integer number (6521472).

Almost surely, 2^135421539 is an apocalyptic number.

135421539 is a deficient number, since it is larger than the sum of its proper divisors (73265565).

135421539 is a wasteful number, since it uses less digits than its factorization.

135421539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767.

The product of its digits is 16200, while the sum is 33.

The square root of 135421539 is about 11637.0760502800. The cubic root of 135421539 is about 513.5261711079.

The spelling of 135421539 in words is "one hundred thirty-five million, four hundred twenty-one thousand, five hundred thirty-nine".