7131885 has 16 divisors (see below), whose sum is σ = 11491200. Its totient is φ = 3776960.

The previous prime is 7131877. The next prime is 7131889. The reversal of 7131885 is 5881317.

7131885 = 840² + 841² + ... + 849².

It is not a de Polignac number, because 7131885 - 2³ = 7131877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7131889) 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, 640 + ... + 3830.

It is an arithmetic number, because the mean of its divisors is an integer number (718200).

Almost surely, 2^7131885 is an apocalyptic number.

It is an amenable number.

7131885 is a deficient number, since it is larger than the sum of its proper divisors (4359315).

7131885 is a wasteful number, since it uses less digits than its factorization.

7131885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348.

The product of its digits is 6720, while the sum is 33.

The square root of 7131885 is about 2670.5589302616. The cubic root of 7131885 is about 192.4870177336.

The spelling of 7131885 in words is "seven million, one hundred thirty-one thousand, eight hundred eighty-five".