2100654 has 20 divisors (see below), whose sum is σ = 4707384. Its totient is φ = 700164.

The previous prime is 2100649. The next prime is 2100661. The reversal of 2100654 is 4560012.

It is a happy number.

2100654 is a `hidden beast` number, since 2 + 10 + 0 + 654 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6322 + ... + 6645.

2^2100654 is an apocalyptic number.

2100654 is an abundant number, since it is smaller than the sum of its proper divisors (2606730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2100654 is a wasteful number, since it uses less digits than its factorization.

2100654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12981 (or 12972 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2100654 is about 1449.3633084910. The cubic root of 2100654 is about 128.0712087503.

Adding to 2100654 its reverse (4560012), we get a palindrome (6660666).

The spelling of 2100654 in words is "two million, one hundred thousand, six hundred fifty-four".