2587281 has 16 divisors (see below), whose sum is σ = 3697344. Its totient is φ = 1603584.

The previous prime is 2587279. The next prime is 2587289. The reversal of 2587281 is 1827852.

It is not a de Polignac number, because 2587281 - 2¹ = 2587279 is a prime.

It is a super-2 number, since 2×2587281² = 13388045945922, which contains 22 as substring.

Its product of digits (8960) is a multiple of the sum of its prime divisors (640).

It is not an unprimeable number, because it can be changed into a prime (2587289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4686 + ... + 5208.

It is an arithmetic number, because the mean of its divisors is an integer number (231084).

2^2587281 is an apocalyptic number.

It is an amenable number.

2587281 is a deficient number, since it is larger than the sum of its proper divisors (1110063).

2587281 is a wasteful number, since it uses less digits than its factorization.

2587281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its digits is 8960, while the sum is 33.

The square root of 2587281 is about 1608.5027199231. The cubic root of 2587281 is about 137.2822957102.

The spelling of 2587281 in words is "two million, five hundred eighty-seven thousand, two hundred eighty-one".