249742525 has 12 divisors (see below), whose sum is σ = 309934900. Its totient is φ = 199630080.

The previous prime is 249742513. The next prime is 249742531. The reversal of 249742525 is 525247942.

It can be written as a sum of positive squares in 6 ways, for example, as 11009124 + 238733401 = 3318^2 + 15451^2 .

It is not a de Polignac number, because 249742525 - 2⁹ = 249742013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33871 + ... + 40579.

Almost surely, 2^249742525 is an apocalyptic number.

249742525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249742525 is a deficient number, since it is larger than the sum of its proper divisors (60192375).

249742525 is a wasteful number, since it uses less digits than its factorization.

249742525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8208 (or 8203 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 249742525 is about 15803.2441289755. The cubic root of 249742525 is about 629.7441852128.

The spelling of 249742525 in words is "two hundred forty-nine million, seven hundred forty-two thousand, five hundred twenty-five".