4161591 has 32 divisors (see below), whose sum is σ = 7150080. Its totient is φ = 2343168.

The previous prime is 4161581. The next prime is 4161593. The reversal of 4161591 is 1951614.

4161591 is a `hidden beast` number, since 41 + 615 + 9 + 1 = 666.

It is not a de Polignac number, because 4161591 - 2⁵ = 4161559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4161593) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18220 + ... + 18446.

It is an arithmetic number, because the mean of its divisors is an integer number (223440).

Almost surely, 2^4161591 is an apocalyptic number.

4161591 is a deficient number, since it is larger than the sum of its proper divisors (2988489).

4161591 is a wasteful number, since it uses less digits than its factorization.

4161591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 334 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 4161591 is about 2039.9977941165. The cubic root of 4161591 is about 160.8495308543.

The spelling of 4161591 in words is "four million, one hundred sixty-one thousand, five hundred ninety-one".