2139128 has 8 divisors (see below), whose sum is σ = 4010880. Its totient is φ = 1069560.

The previous prime is 2139107. The next prime is 2139131. The reversal of 2139128 is 8219312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2139097 and 2139106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133688 + ... + 133703.

It is an arithmetic number, because the mean of its divisors is an integer number (501360).

2^2139128 is an apocalyptic number.

It is an amenable number.

2139128 is a deficient number, since it is larger than the sum of its proper divisors (1871752).

2139128 is a wasteful number, since it uses less digits than its factorization.

2139128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267397 (or 267393 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 2139128 is about 1462.5758100010. The cubic root of 2139128 is about 128.8483685987.

The spelling of 2139128 in words is "two million, one hundred thirty-nine thousand, one hundred twenty-eight".