135021237 has 16 divisors (see below), whose sum is σ = 194302080. Its totient is φ = 82907712.

The previous prime is 135021223. The next prime is 135021269. The reversal of 135021237 is 732120531.

It is not a de Polignac number, because 135021237 - 2¹¹ = 135019189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135021217) 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, 15439 + ... + 22547.

It is an arithmetic number, because the mean of its divisors is an integer number (12143880).

Almost surely, 2^135021237 is an apocalyptic number.

It is an amenable number.

135021237 is a deficient number, since it is larger than the sum of its proper divisors (59280843).

135021237 is a wasteful number, since it uses less digits than its factorization.

135021237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7612.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 135021237 is about 11619.8638976539. The cubic root of 135021237 is about 513.0196824142.

Adding to 135021237 its reverse (732120531), we get a palindrome (867141768).

The spelling of 135021237 in words is "one hundred thirty-five million, twenty-one thousand, two hundred thirty-seven".