1247697157242 has 32 divisors (see below), whose sum is σ = 2647253695104. Its totient is φ = 390683072000.

The previous prime is 1247697157211. The next prime is 1247697157249. The reversal of 1247697157242 is 2427517967421.

It is not an unprimeable number, because it can be changed into a prime (1247697157249) 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, 11686134 + ... + 11792417.

It is an arithmetic number, because the mean of its divisors is an integer number (82726677972).

Almost surely, 2^{1247697157242} is an apocalyptic number.

1247697157242 is an abundant number, since it is smaller than the sum of its proper divisors (1399556537862).

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

1247697157242 is a wasteful number, since it uses less digits than its factorization.

1247697157242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23479094.

The product of its digits is 11854080, while the sum is 57.

The spelling of 1247697157242 in words is "one trillion, two hundred forty-seven billion, six hundred ninety-seven million, one hundred fifty-seven thousand, two hundred forty-two".