8161587 has 48 divisors (see below), whose sum is σ = 14592000. Its totient is φ = 4490640.

The previous prime is 8161579. The next prime is 8161589. The reversal of 8161587 is 7851618.

It is not a de Polignac number, because 8161587 - 2³ = 8161579 is a prime.

It is a super-2 number, since 2×8161587² = 133223004717138, which contains 22 as substring.

Its product of digits (13440) is a multiple of the sum of its prime divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161589) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40914 + ... + 41112.

It is an arithmetic number, because the mean of its divisors is an integer number (304000).

Almost surely, 2^8161587 is an apocalyptic number.

8161587 is a deficient number, since it is larger than the sum of its proper divisors (6430413).

8161587 is a wasteful number, since it uses less digits than its factorization.

8161587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 240 counting only the distinct ones).

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

The square root of 8161587 is about 2856.8491384741. The cubic root of 8161587 is about 201.3375926203.

The spelling of 8161587 in words is "eight million, one hundred sixty-one thousand, five hundred eighty-seven".