84591261 has 6 divisors (see below), whose sum is σ = 122187390. Its totient is φ = 56394168.

The previous prime is 84591253. The next prime is 84591307. The reversal of 84591261 is 16219548.

84591261 is a `hidden beast` number, since 8 + 4 + 591 + 2 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74287161 + 10304100 = 8619^2 + 3210^2 .

It is not a de Polignac number, because 84591261 - 2³ = 84591253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84591251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4699506 + ... + 4699523.

It is an arithmetic number, because the mean of its divisors is an integer number (20364565).

Almost surely, 2^84591261 is an apocalyptic number.

It is an amenable number.

84591261 is a deficient number, since it is larger than the sum of its proper divisors (37596129).

84591261 is a wasteful number, since it uses less digits than its factorization.

84591261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9399035 (or 9399032 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 84591261 is about 9197.3507598656. The cubic root of 84591261 is about 438.9770675526.

The spelling of 84591261 in words is "eighty-four million, five hundred ninety-one thousand, two hundred sixty-one".