249868642 has 16 divisors (see below), whose sum is σ = 392454720. Its totient is φ = 119088112.

The previous prime is 249868631. The next prime is 249868643. The reversal of 249868642 is 246868942.

249868642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (249868643) 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, 4209 + ... + 22747.

It is an arithmetic number, because the mean of its divisors is an integer number (24528420).

Almost surely, 2^249868642 is an apocalyptic number.

249868642 is a deficient number, since it is larger than the sum of its proper divisors (142586078).

249868642 is a wasteful number, since it uses less digits than its factorization.

249868642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18857.

The product of its digits is 1327104, while the sum is 49.

The square root of 249868642 is about 15807.2338503610. The cubic root of 249868642 is about 629.8501718113.

The spelling of 249868642 in words is "two hundred forty-nine million, eight hundred sixty-eight thousand, six hundred forty-two".