249102345 has 24 divisors (see below), whose sum is σ = 405295488. Its totient is φ = 130647360.

The previous prime is 249102341. The next prime is 249102349. The reversal of 249102345 is 543201942.

It is an interprime number because it is at equal distance from previous prime (249102341) and next prime (249102349).

It is not a de Polignac number, because 249102345 - 2² = 249102341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (249102341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53584 + ... + 58046.

It is an arithmetic number, because the mean of its divisors is an integer number (16887312).

Almost surely, 2^249102345 is an apocalyptic number.

It is an amenable number.

249102345 is a deficient number, since it is larger than the sum of its proper divisors (156193143).

249102345 is an equidigital number, since it uses as much as digits as its factorization.

249102345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593 (or 4532 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 249102345 is about 15782.9764303188. The cubic root of 249102345 is about 629.2056377675.

The spelling of 249102345 in words is "two hundred forty-nine million, one hundred two thousand, three hundred forty-five".