7525681 has 4 divisors (see below), whose sum is σ = 7537264. Its totient is φ = 7514100.

The previous prime is 7525657. The next prime is 7525709. The reversal of 7525681 is 1865257.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1865257 = 17 ⋅109721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7525681 is a prime.

It is a super-2 number, since 2×7525681² = 113271749027522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7525601) 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, 4755 + ... + 6136.

It is an arithmetic number, because the mean of its divisors is an integer number (1884316).

Almost surely, 2^7525681 is an apocalyptic number.

It is an amenable number.

7525681 is a deficient number, since it is larger than the sum of its proper divisors (11583).

7525681 is a wasteful number, since it uses less digits than its factorization.

7525681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11582.

The product of its digits is 16800, while the sum is 34.

The square root of 7525681 is about 2743.2974683763. The cubic root of 7525681 is about 195.9665446855.

The spelling of 7525681 in words is "seven million, five hundred twenty-five thousand, six hundred eighty-one".