249847425 has 18 divisors (see below), whose sum is σ = 447504902. Its totient is φ = 133251840.

The previous prime is 249847387. The next prime is 249847439. The reversal of 249847425 is 524748942.

249847425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 14930496 + 234916929 = 3864^2 + 15327^2 .

It is not a de Polignac number, because 249847425 - 2¹⁵ = 249814657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 554992 + ... + 555441.

Almost surely, 2^249847425 is an apocalyptic number.

249847425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249847425 is a deficient number, since it is larger than the sum of its proper divisors (197657477).

249847425 is a wasteful number, since it uses less digits than its factorization.

249847425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110449 (or 1110441 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 249847425 is about 15806.5627193264. The cubic root of 249847425 is about 629.8323438981.

The spelling of 249847425 in words is "two hundred forty-nine million, eight hundred forty-seven thousand, four hundred twenty-five".