142635249 has 15 divisors (see below), whose sum is σ = 213233097. Its totient is φ = 95018508.

The previous prime is 142635217. The next prime is 142635277. The reversal of 142635249 is 942536241.

It is a happy number.

The square root of 142635249 is 11943.

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

142635249 is a `hidden beast` number, since 14 + 2 + 635 + 2 + 4 + 9 = 666.

It is not a de Polignac number, because 142635249 - 2⁵ = 142635217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142630249) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 106824 + ... + 108150.

Almost surely, 2^142635249 is an apocalyptic number.

142635249 is the 11943-rd square number.

142635249 is the 5972-nd centered octagonal number.

It is an amenable number.

142635249 is a deficient number, since it is larger than the sum of its proper divisors (70597848).

142635249 is an frugal number, since it uses more digits than its factorization.

142635249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666 (or 1330 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The cubic root of 142635249 is about 522.4871591664.

Multiplying 142635249 by its sum of digits (36), we get a square (5134868964 = 71658²).

It can be divided in two parts, 142635 and 249, that added together give a square (142884 = 378²).

The spelling of 142635249 in words is "one hundred forty-two million, six hundred thirty-five thousand, two hundred forty-nine".