12540135 has 16 divisors (see below), whose sum is σ = 21244896. Its totient is φ = 6294528.

The previous prime is 12540127. The next prime is 12540149. The reversal of 12540135 is 53104521.

It is not a de Polignac number, because 12540135 - 2³ = 12540127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24334 + ... + 24843.

It is an arithmetic number, because the mean of its divisors is an integer number (1327806).

Almost surely, 2^12540135 is an apocalyptic number.

12540135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12540135 is a deficient number, since it is larger than the sum of its proper divisors (8704761).

12540135 is a wasteful number, since it uses less digits than its factorization.

12540135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49202.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 12540135 is about 3541.2053032831. The cubic root of 12540135 is about 232.3275632041.

Adding to 12540135 its reverse (53104521), we get a palindrome (65644656).

The spelling of 12540135 in words is "twelve million, five hundred forty thousand, one hundred thirty-five".