87240425 has 6 divisors (see below), whose sum is σ = 108178158. Its totient is φ = 69792320.

The previous prime is 87240383. The next prime is 87240443. The reversal of 87240425 is 52404278.

It can be written as a sum of positive squares in 3 ways, for example, as 11689561 + 75550864 = 3419^2 + 8692^2 .

It is not a de Polignac number, because 87240425 - 2²⁴ = 70463209 is a prime.

It is a super-2 number, since 2×87240425² = 15221783508361250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87240391 and 87240400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1744784 + ... + 1744833.

It is an arithmetic number, because the mean of its divisors is an integer number (18029693).

Almost surely, 2^87240425 is an apocalyptic number.

It is an amenable number.

87240425 is a deficient number, since it is larger than the sum of its proper divisors (20937733).

87240425 is a wasteful number, since it uses less digits than its factorization.

87240425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489627 (or 3489622 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 87240425 is about 9340.2582940730. The cubic root of 87240425 is about 443.5125609339.

The spelling of 87240425 in words is "eighty-seven million, two hundred forty thousand, four hundred twenty-five".