1242279869644 has 24 divisors (see below), whose sum is σ = 2435723187408. Its totient is φ = 549411243840.

The previous prime is 1242279869641. The next prime is 1242279869647. The reversal of 1242279869644 is 4469689722421.

It is an interprime number because it is at equal distance from previous prime (1242279869641) and next prime (1242279869647).

It is not an unprimeable number, because it can be changed into a prime (1242279869641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381533959 + ... + 381537214.

It is an arithmetic number, because the mean of its divisors is an integer number (101488466142).

Almost surely, 2^{1242279869644} is an apocalyptic number.

It is an amenable number.

1242279869644 is a deficient number, since it is larger than the sum of its proper divisors (1193443317764).

1242279869644 is a wasteful number, since it uses less digits than its factorization.

1242279869644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763071225 (or 763071223 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 64.

The spelling of 1242279869644 in words is "one trillion, two hundred forty-two billion, two hundred seventy-nine million, eight hundred sixty-nine thousand, six hundred forty-four".