6161591 has 4 divisors (see below), whose sum is σ = 6360384. Its totient is φ = 5962800.

The previous prime is 6161581. The next prime is 6161609. The reversal of 6161591 is 1951616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6161591 - 2⁶ = 6161527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6161501) 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, 99350 + ... + 99411.

It is an arithmetic number, because the mean of its divisors is an integer number (1590096).

Almost surely, 2^6161591 is an apocalyptic number.

6161591 is a deficient number, since it is larger than the sum of its proper divisors (198793).

6161591 is a wasteful number, since it uses less digits than its factorization.

6161591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198792.

The product of its digits is 1620, while the sum is 29.

The square root of 6161591 is about 2482.2552245891. The cubic root of 6161591 is about 183.3289097188.

The spelling of 6161591 in words is "six million, one hundred sixty-one thousand, five hundred ninety-one".