12015255542 has 4 divisors (see below), whose sum is σ = 18022883316. Its totient is φ = 6007627770.

The previous prime is 12015255523. The next prime is 12015255557. The reversal of 12015255542 is 24555251021.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12015255499 and 12015255508.

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, 3003813884 + ... + 3003813887.

It is an arithmetic number, because the mean of its divisors is an integer number (4505720829).

Almost surely, 2^12015255542 is an apocalyptic number.

12015255542 is a deficient number, since it is larger than the sum of its proper divisors (6007627774).

12015255542 is an equidigital number, since it uses as much as digits as its factorization.

12015255542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6007627773.

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 12015255542 in words is "twelve billion, fifteen million, two hundred fifty-five thousand, five hundred forty-two".