249421560 has 32 divisors (see below), whose sum is σ = 748265040. Its totient is φ = 66512384.

The previous prime is 249421559. The next prime is 249421561. The reversal of 249421560 is 65124942.

It is an interprime number because it is at equal distance from previous prime (249421559) and next prime (249421561).

It is a super-2 number, since 2×249421560² = 124422229185667200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249421561) 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, 1039137 + ... + 1039376.

Almost surely, 2^249421560 is an apocalyptic number.

249421560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249421560 is an abundant number, since it is smaller than the sum of its proper divisors (498843480).

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

249421560 is a wasteful number, since it uses less digits than its factorization.

249421560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078527 (or 2078523 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 249421560 is about 15793.0858289316. The cubic root of 249421560 is about 629.4742905898.

The spelling of 249421560 in words is "two hundred forty-nine million, four hundred twenty-one thousand, five hundred sixty".