1587861 has 24 divisors (see below), whose sum is σ = 2567136. Its totient is φ = 937440.

The previous prime is 1587847. The next prime is 1587869. The reversal of 1587861 is 1687851.

It is not a de Polignac number, because 1587861 - 2⁵ = 1587829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1587869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4071 + ... + 4443.

It is an arithmetic number, because the mean of its divisors is an integer number (106964).

2^1587861 is an apocalyptic number.

1587861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1587861 is a deficient number, since it is larger than the sum of its proper divisors (979275).

1587861 is a wasteful number, since it uses less digits than its factorization.

1587861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 430 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 1587861 is about 1260.1035671722. The cubic root of 1587861 is about 116.6641695611.

The spelling of 1587861 in words is "one million, five hundred eighty-seven thousand, eight hundred sixty-one".