249971842 has 16 divisors (see below), whose sum is σ = 400051872. Its totient is φ = 116733760.

The previous prime is 249971837. The next prime is 249971861. The reversal of 249971842 is 248179942.

It is a junction number, because it is equal to n+sod(n) for n = 249971792 and 249971801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23608 + ... + 32515.

It is an arithmetic number, because the mean of its divisors is an integer number (25003242).

Almost surely, 2^249971842 is an apocalyptic number.

249971842 is a deficient number, since it is larger than the sum of its proper divisors (150080030).

249971842 is a wasteful number, since it uses less digits than its factorization.

249971842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56273.

The product of its digits is 290304, while the sum is 46.

The square root of 249971842 is about 15810.4978416241. The cubic root of 249971842 is about 629.9368728215.

The spelling of 249971842 in words is "two hundred forty-nine million, nine hundred seventy-one thousand, eight hundred forty-two".