249557442 has 16 divisors (see below), whose sum is σ = 499273632. Its totient is φ = 83159360.

The previous prime is 249557417. The next prime is 249557453. The reversal of 249557442 is 244755942.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 249557394 and 249557403.

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, 26842 + ... + 34922.

It is an arithmetic number, because the mean of its divisors is an integer number (31204602).

Almost surely, 2^249557442 is an apocalyptic number.

249557442 is an abundant number, since it is smaller than the sum of its proper divisors (249716190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249557442 is a wasteful number, since it uses less digits than its factorization.

249557442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13233.

The product of its digits is 403200, while the sum is 42.

The square root of 249557442 is about 15797.3871890259. The cubic root of 249557442 is about 629.5885799580.

The spelling of 249557442 in words is "two hundred forty-nine million, five hundred fifty-seven thousand, four hundred forty-two".