2587481 has 4 divisors (see below), whose sum is σ = 2786532. Its totient is φ = 2388432.

The previous prime is 2587441. The next prime is 2587499. The reversal of 2587481 is 1847852.

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 1731856 + 855625 = 1316^2 + 925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2587481 is a prime.

It is a super-2 number, since 2×2587481² = 13390115850722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2587411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99506 + ... + 99531.

It is an arithmetic number, because the mean of its divisors is an integer number (696633).

2^2587481 is an apocalyptic number.

It is an amenable number.

2587481 is a deficient number, since it is larger than the sum of its proper divisors (199051).

2587481 is a wasteful number, since it uses less digits than its factorization.

2587481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199050.

The product of its digits is 17920, while the sum is 35.

The square root of 2587481 is about 1608.5648883399. The cubic root of 2587481 is about 137.2858329825.

The spelling of 2587481 in words is "two million, five hundred eighty-seven thousand, four hundred eighty-one".