249995025 has 96 divisors (see below), whose sum is σ = 529767680. Its totient is φ = 113218560.
The previous prime is 249995017. The next prime is 249995033. The reversal of 249995025 is 520599942.
It is an interprime number because it is at equal distance from previous prime (249995017) and next prime (249995033).
It is not a de Polignac number, because 249995025 - 23 = 249995017 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (45).
It is an unprimeable number.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 741657 + ... + 741993.
Almost surely, 2249995025 is an apocalyptic number.
249995025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.
It is an amenable number.
249995025 is an abundant number, since it is smaller than the sum of its proper divisors (279772655).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
249995025 is a wasteful number, since it uses less digits than its factorization.
249995025 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 520 (or 509 counting only the distinct ones).
The product of its (nonzero) digits is 291600, while the sum is 45.
The square root of 249995025 is about 15811.2309767456. The cubic root of 249995025 is about 629.9563461816.
The spelling of 249995025 in words is "two hundred forty-nine million, nine hundred ninety-five thousand, twenty-five".
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