7121525 has 12 divisors (see below), whose sum is σ = 8904192. Its totient is φ = 5649840.

The previous prime is 7121519. The next prime is 7121533. The reversal of 7121525 is 5251217.

It is a happy number.

It is not a de Polignac number, because 7121525 - 2⁴ = 7121509 is a prime.

It is a super-2 number, since 2×7121525² = 101432236651250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7121525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2054 + ... + 4296.

It is an arithmetic number, because the mean of its divisors is an integer number (742016).

Almost surely, 2^7121525 is an apocalyptic number.

It is an amenable number.

7121525 is a deficient number, since it is larger than the sum of its proper divisors (1782667).

7121525 is a wasteful number, since it uses less digits than its factorization.

7121525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380 (or 2375 counting only the distinct ones).

The product of its digits is 700, while the sum is 23.

The square root of 7121525 is about 2668.6185564820. The cubic root of 7121525 is about 192.3937683388.

The spelling of 7121525 in words is "seven million, one hundred twenty-one thousand, five hundred twenty-five".