2123902 has 16 divisors (see below), whose sum is σ = 3596400. Its totient is φ = 931840.

The previous prime is 2123897. The next prime is 2123909. The reversal of 2123902 is 2093212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027 + ... + 2302.

It is an arithmetic number, because the mean of its divisors is an integer number (224775).

2^2123902 is an apocalyptic number.

2123902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2123902 is a deficient number, since it is larger than the sum of its proper divisors (1472498).

2123902 is a wasteful number, since it uses less digits than its factorization.

2123902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2123902 is about 1457.3613141565. The cubic root of 2123902 is about 128.5419324459.

It can be divided in two parts, 2123 and 902, that added together give a square (3025 = 55²).

The spelling of 2123902 in words is "two million, one hundred twenty-three thousand, nine hundred two".