7870725 has 18 divisors (see below), whose sum is σ = 14097746. Its totient is φ = 4197600.

The previous prime is 7870721. The next prime is 7870739. The reversal of 7870725 is 5270787.

It can be written as a sum of positive squares in 3 ways, for example, as 613089 + 7257636 = 783^2 + 2694^2 .

It is not a de Polignac number, because 7870725 - 2² = 7870721 is a prime.

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

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 7870725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7870721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17266 + ... + 17715.

Almost surely, 2^7870725 is an apocalyptic number.

7870725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7870725 is a deficient number, since it is larger than the sum of its proper divisors (6227021).

7870725 is a wasteful number, since it uses less digits than its factorization.

7870725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34997 (or 34989 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The square root of 7870725 is about 2805.4812421401. The cubic root of 7870725 is about 198.9168528846.

The spelling of 7870725 in words is "seven million, eight hundred seventy thousand, seven hundred twenty-five".