2139506 has 8 divisors (see below), whose sum is σ = 3348864. Its totient is φ = 1023220.

The previous prime is 2139499. The next prime is 2139521. The reversal of 2139506 is 6059312.

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, 23210 + ... + 23301.

It is an arithmetic number, because the mean of its divisors is an integer number (418608).

2^2139506 is an apocalyptic number.

2139506 is a deficient number, since it is larger than the sum of its proper divisors (1209358).

2139506 is a wasteful number, since it uses less digits than its factorization.

2139506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46536.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2139506 is about 1462.7050283635. The cubic root of 2139506 is about 128.8559576435.

The spelling of 2139506 in words is "two million, one hundred thirty-nine thousand, five hundred six".