2139587 has 4 divisors (see below), whose sum is σ = 2151720. Its totient is φ = 2127456.

The previous prime is 2139583. The next prime is 2139607. The reversal of 2139587 is 7859312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2139587 - 2² = 2139583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5798 + ... + 6155.

It is an arithmetic number, because the mean of its divisors is an integer number (537930).

2^2139587 is an apocalyptic number.

2139587 is a deficient number, since it is larger than the sum of its proper divisors (12133).

2139587 is a wasteful number, since it uses less digits than its factorization.

2139587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12132.

The product of its digits is 15120, while the sum is 35.

The square root of 2139587 is about 1462.7327165275. The cubic root of 2139587 is about 128.8575837511.

The spelling of 2139587 in words is "two million, one hundred thirty-nine thousand, five hundred eighty-seven".