142156712856601 has 27 divisors (see below), whose sum is σ = 145192891162647. Its totient is φ = 139183737446400.

The previous prime is 142156712856497. The next prime is 142156712856623. The reversal of 142156712856601 is 106658217651241.

The square root of 142156712856601 is 11922949.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 23416898488201 + 118739814368400 = 4839101^2 + 10896780^2 .

It is a de Polignac number, because none of the positive numbers 2^k-142156712856601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142156712856701) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 116809130745 + ... + 116809131961.

Almost surely, 2^{142156712856601} is an apocalyptic number.

142156712856601 is the 11922949-th square number.

142156712856601 is the 5961475-th centered octagonal number.

It is an amenable number.

142156712856601 is a deficient number, since it is larger than the sum of its proper divisors (3036178306046).

142156712856601 is an frugal number, since it uses more digits than its factorization.

142156712856601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830 (or 1415 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 142156712856601 in words is "one hundred forty-two trillion, one hundred fifty-six billion, seven hundred twelve million, eight hundred fifty-six thousand, six hundred one".