142649644 has 24 divisors (see below), whose sum is σ = 265341440. Its totient is φ = 66911184.

The previous prime is 142649641. The next prime is 142649651. The reversal of 142649644 is 446946241.

It is a junction number, because it is equal to n+sod(n) for n = 142649597 and 142649606.

It is not an unprimeable number, because it can be changed into a prime (142649641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1284 + ... + 16939.

Almost surely, 2^142649644 is an apocalyptic number.

It is an amenable number.

142649644 is a deficient number, since it is larger than the sum of its proper divisors (122691796).

142649644 is a wasteful number, since it uses less digits than its factorization.

142649644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18349 (or 18347 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The square root of 142649644 is about 11943.6026390700. The cubic root of 142649644 is about 522.5047353493.

The spelling of 142649644 in words is "one hundred forty-two million, six hundred forty-nine thousand, six hundred forty-four".