2100591 has 12 divisors (see below), whose sum is σ = 3132480. Its totient is φ = 1355040.

The previous prime is 2100589. The next prime is 2100607. The reversal of 2100591 is 1950012.

It is not a de Polignac number, because 2100591 - 2¹ = 2100589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3486 + ... + 4043.

It is an arithmetic number, because the mean of its divisors is an integer number (261040).

2^2100591 is an apocalyptic number.

2100591 is a deficient number, since it is larger than the sum of its proper divisors (1031889).

2100591 is a wasteful number, since it uses less digits than its factorization.

2100591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7566 (or 7563 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 2100591 is about 1449.3415746469. The cubic root of 2100591 is about 128.0699284242.

It can be divided in two parts, 2100 and 591, that multiplied together give a triangular number (1241100 = T₁₅₇₅).

The spelling of 2100591 in words is "two million, one hundred thousand, five hundred ninety-one".