1242357771652 has 12 divisors (see below), whose sum is σ = 2186137848076. Its totient is φ = 617746957920.

The previous prime is 1242357771517. The next prime is 1242357771661. The reversal of 1242357771652 is 2561777532421.

It can be written as a sum of positive squares in 2 ways, for example, as 116263268676 + 1126094502976 = 340974^2 + 1061176^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1242357771652.

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, 857981163 + ... + 857982610.

Almost surely, 2^{1242357771652} is an apocalyptic number.

It is an amenable number.

1242357771652 is a deficient number, since it is larger than the sum of its proper divisors (943780076424).

1242357771652 is a wasteful number, since it uses less digits than its factorization.

1242357771652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715963958 (or 1715963956 counting only the distinct ones).

The product of its digits is 4939200, while the sum is 52.

The spelling of 1242357771652 in words is "one trillion, two hundred forty-two billion, three hundred fifty-seven million, seven hundred seventy-one thousand, six hundred fifty-two".