2105402 has 12 divisors (see below), whose sum is σ = 3420270. Its totient is φ = 971568.

The previous prime is 2105381. The next prime is 2105407. The reversal of 2105402 is 2045012.

It is a Cunningham number, because it is equal to 1451²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1062961 + 1042441 = 1031^2 + 1021^2 .

It is not an unprimeable number, because it can be changed into a prime (2105407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2777 + ... + 3452.

2^2105402 is an apocalyptic number.

2105402 is a deficient number, since it is larger than the sum of its proper divisors (1314868).

2105402 is a wasteful number, since it uses less digits than its factorization.

2105402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6257 (or 6244 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2105402 is about 1451.0003445899. Note that the first 3 decimals coincide. The cubic root of 2105402 is about 128.1676270617.

The spelling of 2105402 in words is "two million, one hundred five thousand, four hundred two".