12542779 has 8 divisors (see below), whose sum is σ = 12757248. Its totient is φ = 12330240.

The previous prime is 12542773. The next prime is 12542791. The reversal of 12542779 is 97724521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12542779 - 2⁹ = 12542267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12542773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18189 + ... + 18865.

It is an arithmetic number, because the mean of its divisors is an integer number (1594656).

Almost surely, 2^12542779 is an apocalyptic number.

12542779 is a deficient number, since it is larger than the sum of its proper divisors (214469).

12542779 is an equidigital number, since it uses as much as digits as its factorization.

12542779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965.

The product of its digits is 35280, while the sum is 37.

The square root of 12542779 is about 3541.5786028267. The cubic root of 12542779 is about 232.3438902721.

The spelling of 12542779 in words is "twelve million, five hundred forty-two thousand, seven hundred seventy-nine".