249204125 has 8 divisors (see below), whose sum is σ = 311006904. Its totient is φ = 199363200.

The previous prime is 249204121. The next prime is 249204143. The reversal of 249204125 is 521402942.

It can be written as a sum of positive squares in 4 ways, for example, as 26030404 + 223173721 = 5102^2 + 14939^2 .

It is not a de Polignac number, because 249204125 - 2² = 249204121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249204121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996692 + ... + 996941.

It is an arithmetic number, because the mean of its divisors is an integer number (38875863).

Almost surely, 2^249204125 is an apocalyptic number.

249204125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249204125 is a deficient number, since it is larger than the sum of its proper divisors (61802779).

249204125 is an equidigital number, since it uses as much as digits as its factorization.

249204125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993648 (or 1993638 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 249204125 is about 15786.2004611623. The cubic root of 249204125 is about 629.2913211971.

The spelling of 249204125 in words is "two hundred forty-nine million, two hundred four thousand, one hundred twenty-five".