7125815 has 12 divisors (see below), whose sum is σ = 8841672. Its totient is φ = 5513040.

The previous prime is 7125809. The next prime is 7125821. The reversal of 7125815 is 5185217.

It is an interprime number because it is at equal distance from previous prime (7125809) and next prime (7125821).

It is not a de Polignac number, because 7125815 - 2⁶ = 7125751 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4064 + ... + 5546.

It is an arithmetic number, because the mean of its divisors is an integer number (736806).

Almost surely, 2^7125815 is an apocalyptic number.

7125815 is a deficient number, since it is larger than the sum of its proper divisors (1715857).

7125815 is a wasteful number, since it uses less digits than its factorization.

7125815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550 (or 1519 counting only the distinct ones).

The product of its digits is 2800, while the sum is 29.

The square root of 7125815 is about 2669.4222221297. The cubic root of 7125815 is about 192.4323931927.

The spelling of 7125815 in words is "seven million, one hundred twenty-five thousand, eight hundred fifteen".