2101404 has 24 divisors (see below), whose sum is σ = 5192208. Its totient is φ = 659200.

The previous prime is 2101391. The next prime is 2101423. The reversal of 2101404 is 4041012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2101404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4947 + ... + 5354.

It is an arithmetic number, because the mean of its divisors is an integer number (216342).

2^2101404 is an apocalyptic number.

It is an amenable number.

2101404 is an abundant number, since it is smaller than the sum of its proper divisors (3090804).

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

2101404 is a wasteful number, since it uses less digits than its factorization.

2101404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10325 (or 10323 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2101404 is about 1449.6220197003. The cubic root of 2101404 is about 128.0864487625.

Adding to 2101404 its reverse (4041012), we get a palindrome (6142416).

The spelling of 2101404 in words is "two million, one hundred one thousand, four hundred four".