2100457 has 4 divisors (see below), whose sum is σ = 2103376. Its totient is φ = 2097540.

The previous prime is 2100451. The next prime is 2100463. The reversal of 2100457 is 7540012.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (2100451) and next prime (2100463).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100457 is a prime.

It is a Duffinian number.

2100457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2100451) 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, 478 + ... + 2104.

It is an arithmetic number, because the mean of its divisors is an integer number (525844).

2^2100457 is an apocalyptic number.

It is an amenable number.

2100457 is a deficient number, since it is larger than the sum of its proper divisors (2919).

2100457 is a wasteful number, since it uses less digits than its factorization.

2100457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 2100457 is about 1449.2953460216. The cubic root of 2100457 is about 128.0672051056.

Adding to 2100457 its reverse (7540012), we get a palindrome (9640469).

The spelling of 2100457 in words is "two million, one hundred thousand, four hundred fifty-seven".