2100957 has 4 divisors (see below), whose sum is σ = 2801280. Its totient is φ = 1400636.

The previous prime is 2100953. The next prime is 2100983. The reversal of 2100957 is 7590012.

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.

It is a cyclic number.

It is not a de Polignac number, because 2100957 - 2² = 2100953 is a prime.

It is a D-number.

2100957 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100953) 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, 350157 + ... + 350162.

It is an arithmetic number, because the mean of its divisors is an integer number (700320).

2^2100957 is an apocalyptic number.

It is an amenable number.

2100957 is a deficient number, since it is larger than the sum of its proper divisors (700323).

2100957 is an equidigital number, since it uses as much as digits as its factorization.

2100957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700322.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 2100957 is about 1449.4678333789. The cubic root of 2100957 is about 128.0773661519.

Adding to 2100957 its reverse (7590012), we get a palindrome (9690969).

The spelling of 2100957 in words is "two million, one hundred thousand, nine hundred fifty-seven".