77250825 has 18 divisors (see below), whose sum is σ = 138365214. Its totient is φ = 41200320.

The previous prime is 77250773. The next prime is 77250841. The reversal of 77250825 is 52805277.

It can be written as a sum of positive squares in 3 ways, for example, as 18636489 + 58614336 = 4317^2 + 7656^2 .

It is not a de Polignac number, because 77250825 - 2²² = 73056521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77250825.

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, 171444 + ... + 171893.

Almost surely, 2^77250825 is an apocalyptic number.

77250825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77250825 is a deficient number, since it is larger than the sum of its proper divisors (61114389).

77250825 is a wasteful number, since it uses less digits than its factorization.

77250825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343353 (or 343345 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 77250825 is about 8789.2448481084. The cubic root of 77250825 is about 425.8935295647.

The spelling of 77250825 in words is "seventy-seven million, two hundred fifty thousand, eight hundred twenty-five".