75249525 has 48 divisors (see below), whose sum is σ = 135366336. Its totient is φ = 36664320.

The previous prime is 75249521. The next prime is 75249547. The reversal of 75249525 is 52594257.

It is not a de Polignac number, because 75249525 - 2² = 75249521 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75249521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109834 + ... + 110516.

It is an arithmetic number, because the mean of its divisors is an integer number (2820132).

Almost surely, 2^75249525 is an apocalyptic number.

75249525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

75249525 is a deficient number, since it is larger than the sum of its proper divisors (60116811).

75249525 is a wasteful number, since it uses less digits than its factorization.

75249525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 817 counting only the distinct ones).

The product of its digits is 126000, while the sum is 39.

The square root of 75249525 is about 8674.6484078607. The cubic root of 75249525 is about 422.1834983594.

The spelling of 75249525 in words is "seventy-five million, two hundred forty-nine thousand, five hundred twenty-five".