2101902 has 16 divisors (see below), whose sum is σ = 4586112. Its totient is φ = 636920.

The previous prime is 2101873. The next prime is 2101903. The reversal of 2101902 is 2091012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101903) 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 7 ways as a sum of consecutive naturals, for example, 15858 + ... + 15989.

It is an arithmetic number, because the mean of its divisors is an integer number (286632).

2^2101902 is an apocalyptic number.

2101902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2101902 is an abundant number, since it is smaller than the sum of its proper divisors (2484210).

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

2101902 is a wasteful number, since it uses less digits than its factorization.

2101902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31863.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2101902 is about 1449.7937784389. The cubic root of 2101902 is about 128.0965661274.

Adding to 2101902 its reverse (2091012), we get a palindrome (4192914).

It can be divided in two parts, 2101 and 902, that added together give a palindrome (3003).

The spelling of 2101902 in words is "two million, one hundred one thousand, nine hundred two".