1242515868 has 48 divisors (see below), whose sum is σ = 3329235840. Its totient is φ = 356702400.

The previous prime is 1242515863. The next prime is 1242515891. The reversal of 1242515868 is 8685152421.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242515863) 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, 245203 + ... + 250218.

It is an arithmetic number, because the mean of its divisors is an integer number (69359080).

Almost surely, 2^1242515868 is an apocalyptic number.

It is an amenable number.

1242515868 is an abundant number, since it is smaller than the sum of its proper divisors (2086719972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242515868 is a wasteful number, since it uses less digits than its factorization.

1242515868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495458 (or 495456 counting only the distinct ones).

The product of its digits is 153600, while the sum is 42.

The square root of 1242515868 is about 35249.3385469855. The cubic root of 1242515868 is about 1075.0631635502.

The spelling of 1242515868 in words is "one billion, two hundred forty-two million, five hundred fifteen thousand, eight hundred sixty-eight".