2587421885 has 4 divisors (see below), whose sum is σ = 3104906268. Its totient is φ = 2069937504.

The previous prime is 2587421849. The next prime is 2587421897. The reversal of 2587421885 is 5881247852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 589421284 + 1998000601 = 24278^2 + 44699^2 .

It is a cyclic number.

It is not a de Polignac number, because 2587421885 - 2²⁸ = 2318986429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258742184 + ... + 258742193.

It is an arithmetic number, because the mean of its divisors is an integer number (776226567).

Almost surely, 2^2587421885 is an apocalyptic number.

It is an amenable number.

2587421885 is a deficient number, since it is larger than the sum of its proper divisors (517484383).

2587421885 is an equidigital number, since it uses as much as digits as its factorization.

2587421885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517484382.

The product of its digits is 1433600, while the sum is 50.

The square root of 2587421885 is about 50866.7070390840. The cubic root of 2587421885 is about 1372.8478747221.

The spelling of 2587421885 in words is "two billion, five hundred eighty-seven million, four hundred twenty-one thousand, eight hundred eighty-five".