1242123976 has 16 divisors (see below), whose sum is σ = 2335699440. Its totient is φ = 619270800.

The previous prime is 1242123959. The next prime is 1242123977. The reversal of 1242123976 is 6793212421.

It is not an unprimeable number, because it can be changed into a prime (1242123977) 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, 220950 + ... + 226501.

It is an arithmetic number, because the mean of its divisors is an integer number (145981215).

Almost surely, 2^1242123976 is an apocalyptic number.

It is an amenable number.

1242123976 is a deficient number, since it is larger than the sum of its proper divisors (1093575464).

1242123976 is a wasteful number, since it uses less digits than its factorization.

1242123976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447804 (or 447800 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 1242123976 is about 35243.7792525149. The cubic root of 1242123976 is about 1074.9501259717.

The spelling of 1242123976 in words is "one billion, two hundred forty-two million, one hundred twenty-three thousand, nine hundred seventy-six".