1242406863 has 32 divisors (see below), whose sum is σ = 1864255680. Its totient is φ = 817689600.

The previous prime is 1242406859. The next prime is 1242407029. The reversal of 1242406863 is 3686042421.

1242406863 is a `hidden beast` number, since 1 + 242 + 406 + 8 + 6 + 3 = 666.

It is not a de Polignac number, because 1242406863 - 2² = 1242406859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242406843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 954313 + ... + 955613.

It is an arithmetic number, because the mean of its divisors is an integer number (58257990).

Almost surely, 2^1242406863 is an apocalyptic number.

1242406863 is a deficient number, since it is larger than the sum of its proper divisors (621848817).

1242406863 is a wasteful number, since it uses less digits than its factorization.

1242406863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 1242406863 is about 35247.7923138457. The cubic root of 1242406863 is about 1075.0317244649.

The spelling of 1242406863 in words is "one billion, two hundred forty-two million, four hundred six thousand, eight hundred sixty-three".