2587257281 has 12 divisors (see below), whose sum is σ = 3140523072. Its totient is φ = 2121228648.

The previous prime is 2587257271. The next prime is 2587257289. The reversal of 2587257281 is 1827527852.

It is not a de Polignac number, because 2587257281 - 2²⁶ = 2520148417 is a prime.

It is a super-2 number, since 2×2587257281² = 13387800476175025922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2587257289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1146725 + ... + 1148978.

It is an arithmetic number, because the mean of its divisors is an integer number (261710256).

Almost surely, 2^2587257281 is an apocalyptic number.

It is an amenable number.

2587257281 is a deficient number, since it is larger than the sum of its proper divisors (553265791).

2587257281 is a wasteful number, since it uses less digits than its factorization.

2587257281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295740 (or 2295733 counting only the distinct ones).

The product of its digits is 627200, while the sum is 47.

The square root of 2587257281 is about 50865.0890198769. The cubic root of 2587257281 is about 1372.8187619536.

The spelling of 2587257281 in words is "two billion, five hundred eighty-seven million, two hundred fifty-seven thousand, two hundred eighty-one".