142671642961 has 9 divisors (see below), whose sum is σ = 143186814043. Its totient is φ = 142158322840.

The previous prime is 142671642857. The next prime is 142671642989. The reversal of 142671642961 is 169246176241.

The square root of 142671642961 is 377719.

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

It can be written as a sum of positive squares in only one way, i.e., 33679223361 + 108992419600 = 183519^2 + 330140^2 .

It is not a de Polignac number, because 142671642961 - 2²⁹ = 142134772049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142671642661) 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, 146932206 + ... + 146933176.

Almost surely, 2^142671642961 is an apocalyptic number.

142671642961 is the 377719-th square number.

142671642961 is the 188860-th centered octagonal number.

It is an amenable number.

142671642961 is a deficient number, since it is larger than the sum of its proper divisors (515171082).

142671642961 is an frugal number, since it uses more digits than its factorization.

142671642961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720 (or 1360 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

Multiplying 142671642961 by its sum of digits (49), we get a square (6990910505089 = 2644033²).

The spelling of 142671642961 in words is "one hundred forty-two billion, six hundred seventy-one million, six hundred forty-two thousand, nine hundred sixty-one".