142643272 has 8 divisors (see below), whose sum is σ = 267456150. Its totient is φ = 71321632.

The previous prime is 142643239. The next prime is 142643287. The reversal of 142643272 is 272346241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 139381636 + 3261636 = 11806^2 + 1806^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8915197 + ... + 8915212.

Almost surely, 2^142643272 is an apocalyptic number.

It is an amenable number.

142643272 is a deficient number, since it is larger than the sum of its proper divisors (124812878).

142643272 is a wasteful number, since it uses less digits than its factorization.

142643272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17830415 (or 17830411 counting only the distinct ones).

The product of its digits is 16128, while the sum is 31.

The square root of 142643272 is about 11943.3358824074. The cubic root of 142643272 is about 522.4969553328.

The spelling of 142643272 in words is "one hundred forty-two million, six hundred forty-three thousand, two hundred seventy-two".