2139567 has 4 divisors (see below), whose sum is σ = 2852760. Its totient is φ = 1426376.

The previous prime is 2139563. The next prime is 2139583. The reversal of 2139567 is 7659312.

2139567 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2139567 - 2² = 2139563 is a prime.

It is a D-number.

2139567 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356592 + ... + 356597.

It is an arithmetic number, because the mean of its divisors is an integer number (713190).

2^2139567 is an apocalyptic number.

2139567 is a deficient number, since it is larger than the sum of its proper divisors (713193).

2139567 is an equidigital number, since it uses as much as digits as its factorization.

2139567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713192.

The product of its digits is 11340, while the sum is 33.

The square root of 2139567 is about 1462.7258799926. The cubic root of 2139567 is about 128.8571822468.

The spelling of 2139567 in words is "two million, one hundred thirty-nine thousand, five hundred sixty-seven".