7091561 has 4 divisors (see below), whose sum is σ = 7104000. Its totient is φ = 7079124.

The previous prime is 7091549. The next prime is 7091587. The reversal of 7091561 is 1651907.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1651907 = 17 ⋅97171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7091561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7093561) 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, 5321 + ... + 6518.

It is an arithmetic number, because the mean of its divisors is an integer number (1776000).

Almost surely, 2^7091561 is an apocalyptic number.

It is an amenable number.

7091561 is a deficient number, since it is larger than the sum of its proper divisors (12439).

7091561 is a wasteful number, since it uses less digits than its factorization.

7091561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12438.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 7091561 is about 2662.9984979342. The cubic root of 7091561 is about 192.1235550942.

The spelling of 7091561 in words is "seven million, ninety-one thousand, five hundred sixty-one".