12542131 has 4 divisors (see below), whose sum is σ = 14333872. Its totient is φ = 10750392.

The previous prime is 12542113. The next prime is 12542137. The reversal of 12542131 is 13124521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12542131 - 2⁵ = 12542099 is a prime.

It is a super-2 number, since 2×12542131² = 314610100042322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12542099 and 12542108.

It is not an unprimeable number, because it can be changed into a prime (12542137) 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, 895860 + ... + 895873.

It is an arithmetic number, because the mean of its divisors is an integer number (3583468).

Almost surely, 2^12542131 is an apocalyptic number.

12542131 is a deficient number, since it is larger than the sum of its proper divisors (1791741).

12542131 is an equidigital number, since it uses as much as digits as its factorization.

12542131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791740.

The product of its digits is 240, while the sum is 19.

The square root of 12542131 is about 3541.4871170174. The cubic root of 12542131 is about 232.3398889941.

Adding to 12542131 its reverse (13124521), we get a palindrome (25666652).

The spelling of 12542131 in words is "twelve million, five hundred forty-two thousand, one hundred thirty-one".