12540235 has 4 divisors (see below), whose sum is σ = 15048288. Its totient is φ = 10032184.

The previous prime is 12540217. The next prime is 12540259. The reversal of 12540235 is 53204521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53204521 = 6763 ⋅7867.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12540235 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254019 + ... + 1254028.

It is an arithmetic number, because the mean of its divisors is an integer number (3762072).

Almost surely, 2^12540235 is an apocalyptic number.

12540235 is a deficient number, since it is larger than the sum of its proper divisors (2508053).

12540235 is an equidigital number, since it uses as much as digits as its factorization.

12540235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508052.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 12540235 is about 3541.2194227413. The cubic root of 12540235 is about 232.3281807597.

Adding to 12540235 its reverse (53204521), we get a palindrome (65744756).

The spelling of 12540235 in words is "twelve million, five hundred forty thousand, two hundred thirty-five".