2102139 has 32 divisors (see below), whose sum is σ = 3447360. Its totient is φ = 1257984.

The previous prime is 2102137. The next prime is 2102143. The reversal of 2102139 is 9312012.

It is a happy number.

It is not a de Polignac number, because 2102139 - 2¹ = 2102137 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2102137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18547 + ... + 18659.

It is an arithmetic number, because the mean of its divisors is an integer number (107730).

2^2102139 is an apocalyptic number.

2102139 is a deficient number, since it is larger than the sum of its proper divisors (1345221).

2102139 is a wasteful number, since it uses less digits than its factorization.

2102139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 2102139 is about 1449.8755118975. The cubic root of 2102139 is about 128.1013804567.

The spelling of 2102139 in words is "two million, one hundred two thousand, one hundred thirty-nine".