12542501 has 4 divisors (see below), whose sum is σ = 12549600. Its totient is φ = 12535404.

The previous prime is 12542479. The next prime is 12542539. The reversal of 12542501 is 10524521.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10524521 = 7 ⋅1503503.

It is a cyclic number.

It is not a de Polignac number, because 12542501 - 2⁶ = 12542437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1430 + ... + 5208.

It is an arithmetic number, because the mean of its divisors is an integer number (3137400).

Almost surely, 2^12542501 is an apocalyptic number.

It is an amenable number.

12542501 is a deficient number, since it is larger than the sum of its proper divisors (7099).

12542501 is an equidigital number, since it uses as much as digits as its factorization.

12542501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7098.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 12542501 is about 3541.5393545745. The cubic root of 12542501 is about 232.3421736913.

The spelling of 12542501 in words is "twelve million, five hundred forty-two thousand, five hundred one".