1242279869643 has 24 divisors (see below), whose sum is σ = 1800984000816. Its totient is φ = 825150412800.

The previous prime is 1242279869641. The next prime is 1242279869647. The reversal of 1242279869643 is 3469689722421.

1242279869643 is a `hidden beast` number, since 1 + 2 + 422 + 7 + 9 + 86 + 96 + 43 = 666.

It is not a de Polignac number, because 1242279869643 - 2¹ = 1242279869641 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 30355371 + ... + 30396267.

It is an arithmetic number, because the mean of its divisors is an integer number (75041000034).

Almost surely, 2^{1242279869643} is an apocalyptic number.

1242279869643 is a deficient number, since it is larger than the sum of its proper divisors (558704131173).

1242279869643 is a wasteful number, since it uses less digits than its factorization.

1242279869643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53195 (or 53192 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 1242279869643 in words is "one trillion, two hundred forty-two billion, two hundred seventy-nine million, eight hundred sixty-nine thousand, six hundred forty-three".