7818525 has 96 divisors (see below), whose sum is σ = 17082240. Its totient is φ = 3499200.

The previous prime is 7818469. The next prime is 7818563. The reversal of 7818525 is 5258187.

It is not a de Polignac number, because 7818525 - 2⁷ = 7818397 is a prime.

It is a super-2 number, since 2×7818525² = 122258666351250, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

Its product of digits (22400) is a multiple of the sum of its prime divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 7818525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 601419 + ... + 601431.

It is an arithmetic number, because the mean of its divisors is an integer number (177940).

Almost surely, 2^7818525 is an apocalyptic number.

7818525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7818525 is an abundant number, since it is smaller than the sum of its proper divisors (9263715).

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

7818525 is a wasteful number, since it uses less digits than its factorization.

7818525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 32 counting only the distinct ones).

The product of its digits is 22400, while the sum is 36.

The square root of 7818525 is about 2796.1625489231. The cubic root of 7818525 is about 198.4761268762.

It can be divided in two parts, 78185 and 25, that added together give a triangular number (78210 = T₃₉₅).

The spelling of 7818525 in words is "seven million, eight hundred eighteen thousand, five hundred twenty-five".