142286629681 has 9 divisors (see below), whose sum is σ = 165520171449. Its totient is φ = 121957705044.

The previous prime is 142286629679. The next prime is 142286629691. The reversal of 142286629681 is 186926682241.

The square root of 142286629681 is 377209.

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

It is not a de Polignac number, because 142286629681 - 2¹ = 142286629679 is a prime.

It is a super-2 number, since 2×142286629681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142286629621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2613520 + ... + 2667406.

It is an arithmetic number, because the mean of its divisors is an integer number (18391130161).

Almost surely, 2^142286629681 is an apocalyptic number.

142286629681 is the 377209-th square number.

142286629681 is the 188605-th centered octagonal number.

It is an amenable number.

142286629681 is a deficient number, since it is larger than the sum of its proper divisors (23233541768).

142286629681 is an frugal number, since it uses more digits than its factorization.

142286629681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107788 (or 53894 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 55.

The spelling of 142286629681 in words is "one hundred forty-two billion, two hundred eighty-six million, six hundred twenty-nine thousand, six hundred eighty-one".