75725144 has 16 divisors (see below), whose sum is σ = 154892520. Its totient is φ = 34420480.

The previous prime is 75725137. The next prime is 75725149. The reversal of 75725144 is 44152757.

75725144 = 2168² + 2169² + ... + 2183².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75725149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430169 + ... + 430344.

Almost surely, 2^75725144 is an apocalyptic number.

It is an amenable number.

75725144 is an abundant number, since it is smaller than the sum of its proper divisors (79167376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75725144 is a wasteful number, since it uses less digits than its factorization.

75725144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860530 (or 860526 counting only the distinct ones).

The product of its digits is 39200, while the sum is 35.

The square root of 75725144 is about 8702.0195357170. The cubic root of 75725144 is about 423.0711093653.

The spelling of 75725144 in words is "seventy-five million, seven hundred twenty-five thousand, one hundred forty-four".