12542661 has 16 divisors (see below), whose sum is σ = 18750720. Its totient is φ = 8285760.

The previous prime is 12542657. The next prime is 12542723. The reversal of 12542661 is 16624521.

It is not a de Polignac number, because 12542661 - 2² = 12542657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 996 + ... + 5106.

It is an arithmetic number, because the mean of its divisors is an integer number (1171920).

Almost surely, 2^12542661 is an apocalyptic number.

It is an amenable number.

12542661 is a deficient number, since it is larger than the sum of its proper divisors (6208059).

12542661 is a wasteful number, since it uses less digits than its factorization.

12542661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4233 (or 4227 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12542661 is about 3541.5619435498. The cubic root of 12542661 is about 232.3431616546.

It can be divided in two parts, 12542 and 661, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 12542661 in words is "twelve million, five hundred forty-two thousand, six hundred sixty-one".