249917120 has 28 divisors (see below), whose sum is σ = 595115904. Its totient is φ = 99966720.

The previous prime is 249917117. The next prime is 249917123. The reversal of 249917120 is 21719942.

It is an interprime number because it is at equal distance from previous prime (249917117) and next prime (249917123).

It is not an unprimeable number, because it can be changed into a prime (249917123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390176 + ... + 390815.

Almost surely, 2^249917120 is an apocalyptic number.

249917120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249917120 is an abundant number, since it is smaller than the sum of its proper divisors (345198784).

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

249917120 is an equidigital number, since it uses as much as digits as its factorization.

249917120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781008 (or 780998 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 249917120 is about 15808.7671878613. The cubic root of 249917120 is about 629.8909024154.

The spelling of 249917120 in words is "two hundred forty-nine million, nine hundred seventeen thousand, one hundred twenty".