87040825 has 6 divisors (see below), whose sum is σ = 107930654. Its totient is φ = 69632640.

The previous prime is 87040819. The next prime is 87040829. The reversal of 87040825 is 52804078.

It can be written as a sum of positive squares in 3 ways, for example, as 29241 + 87011584 = 171^2 + 9328^2 .

It is not a de Polignac number, because 87040825 - 2¹³ = 87032633 is a prime.

It is a super-2 number, since 2×87040825² = 15152210433361250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87040829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1740792 + ... + 1740841.

Almost surely, 2^87040825 is an apocalyptic number.

It is an amenable number.

87040825 is a deficient number, since it is larger than the sum of its proper divisors (20889829).

87040825 is a wasteful number, since it uses less digits than its factorization.

87040825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481643 (or 3481638 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 87040825 is about 9329.5672461267. The cubic root of 87040825 is about 443.1740607253.

The spelling of 87040825 in words is "eighty-seven million, forty thousand, eight hundred twenty-five".