2139290 has 8 divisors (see below), whose sum is σ = 3850740. Its totient is φ = 855712.

The previous prime is 2139283. The next prime is 2139307. The reversal of 2139290 is 929312.

It can be written as a sum of positive squares in 2 ways, for example, as 2128681 + 10609 = 1459^2 + 103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106955 + ... + 106974.

2^2139290 is an apocalyptic number.

2139290 is a deficient number, since it is larger than the sum of its proper divisors (1711450).

2139290 is a wasteful number, since it uses less digits than its factorization.

2139290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213936.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 2139290 is about 1462.6311906971. The cubic root of 2139290 is about 128.8516211559.

The spelling of 2139290 in words is "two million, one hundred thirty-nine thousand, two hundred ninety".