1242198892864 has 28 divisors (see below), whose sum is σ = 2465025521044. Its totient is φ = 621090100224.

The previous prime is 1242198892817. The next prime is 1242198892903. The reversal of 1242198892864 is 4682988912421.

It can be written as a sum of positive squares in 2 ways, for example, as 1128710758464 + 113488134400 = 1062408^2 + 336880^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a junction number, because it is equal to n+sod(n) for n = 1242198892796 and 1242198892805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6449284 + ... + 6639100.

Almost surely, 2^{1242198892864} is an apocalyptic number.

It is an amenable number.

1242198892864 is a deficient number, since it is larger than the sum of its proper divisors (1222826628180).

1242198892864 is a wasteful number, since it uses less digits than its factorization.

1242198892864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292082 (or 292072 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 64.

The spelling of 1242198892864 in words is "one trillion, two hundred forty-two billion, one hundred ninety-eight million, eight hundred ninety-two thousand, eight hundred sixty-four".