12542542 has 4 divisors (see below), whose sum is σ = 18813816. Its totient is φ = 6271270.

The previous prime is 12542539. The next prime is 12542557. The reversal of 12542542 is 24524521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24524521 = 7 ⋅3503503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3135634 + ... + 3135637.

It is an arithmetic number, because the mean of its divisors is an integer number (4703454).

Almost surely, 2^12542542 is an apocalyptic number.

12542542 is a deficient number, since it is larger than the sum of its proper divisors (6271274).

12542542 is an equidigital number, since it uses as much as digits as its factorization.

12542542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6271273.

The product of its digits is 3200, while the sum is 25.

The square root of 12542542 is about 3541.5451430131. The cubic root of 12542542 is about 232.3424268577.

The spelling of 12542542 in words is "twelve million, five hundred forty-two thousand, five hundred forty-two".