12540553 has 4 divisors (see below), whose sum is σ = 12691728. Its totient is φ = 12389380.

The previous prime is 12540529. The next prime is 12540581. The reversal of 12540553 is 35504521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12540553 - 2⁹ = 12540041 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12540503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75463 + ... + 75628.

It is an arithmetic number, because the mean of its divisors is an integer number (3172932).

Almost surely, 2^12540553 is an apocalyptic number.

It is an amenable number.

12540553 is a deficient number, since it is larger than the sum of its proper divisors (151175).

12540553 is an equidigital number, since it uses as much as digits as its factorization.

12540553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151174.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 12540553 is about 3541.2643222442. The cubic root of 12540553 is about 232.3301445650.

The spelling of 12540553 in words is "twelve million, five hundred forty thousand, five hundred fifty-three".