1242879404 has 72 divisors (see below), whose sum is σ = 2455584768. Its totient is φ = 549581760.

The previous prime is 1242879403. The next prime is 1242879431. The reversal of 1242879404 is 4049782421.

It is not an unprimeable number, because it can be changed into a prime (1242879403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2661179 + ... + 2661645.

It is an arithmetic number, because the mean of its divisors is an integer number (34105344).

Almost surely, 2^1242879404 is an apocalyptic number.

It is an amenable number.

1242879404 is a deficient number, since it is larger than the sum of its proper divisors (1212705364).

1242879404 is a wasteful number, since it uses less digits than its factorization.

1242879404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 1242879404 is about 35254.4948056273. The cubic root of 1242879404 is about 1075.1680008572.

The spelling of 1242879404 in words is "one billion, two hundred forty-two million, eight hundred seventy-nine thousand, four hundred four".