2100641 has 4 divisors (see below), whose sum is σ = 2103552. Its totient is φ = 2097732.

The previous prime is 2100629. The next prime is 2100649. The reversal of 2100641 is 1460012.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100641 is a prime.

It is a super-2 number, since 2×2100641² = 8825385221762, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536 + ... + 2118.

It is an arithmetic number, because the mean of its divisors is an integer number (525888).

2^2100641 is an apocalyptic number.

It is an amenable number.

2100641 is a deficient number, since it is larger than the sum of its proper divisors (2911).

2100641 is a wasteful number, since it uses less digits than its factorization.

2100641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2100641 is about 1449.3588237562. The cubic root of 2100641 is about 128.0709445581.

Adding to 2100641 its reverse (1460012), we get a palindrome (3560653).

The spelling of 2100641 in words is "two million, one hundred thousand, six hundred forty-one".