4961591 has 4 divisors (see below), whose sum is σ = 5029632. Its totient is φ = 4893552.

The previous prime is 4961587. The next prime is 4961599. The reversal of 4961591 is 1951694.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1951694 = 2 ⋅975847.

It is a cyclic number.

It is not a de Polignac number, because 4961591 - 2² = 4961587 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 (4961599) 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, 33911 + ... + 34056.

It is an arithmetic number, because the mean of its divisors is an integer number (1257408).

Almost surely, 2^4961591 is an apocalyptic number.

4961591 is a deficient number, since it is larger than the sum of its proper divisors (68041).

4961591 is an equidigital number, since it uses as much as digits as its factorization.

4961591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68040.

The product of its digits is 9720, while the sum is 35.

The square root of 4961591 is about 2227.4629065374. The cubic root of 4961591 is about 170.5586122421.

The spelling of 4961591 in words is "four million, nine hundred sixty-one thousand, five hundred ninety-one".