2139573 has 4 divisors (see below), whose sum is σ = 2852768. Its totient is φ = 1426380.

The previous prime is 2139563. The next prime is 2139583. The reversal of 2139573 is 3759312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2139563) and next prime (2139583).

It is not a de Polignac number, because 2139573 - 2⁵ = 2139541 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2139573.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356593 + ... + 356598.

It is an arithmetic number, because the mean of its divisors is an integer number (713192).

2^2139573 is an apocalyptic number.

It is an amenable number.

2139573 is a deficient number, since it is larger than the sum of its proper divisors (713195).

2139573 is an equidigital number, since it uses as much as digits as its factorization.

2139573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713194.

The product of its digits is 5670, while the sum is 30.

The square root of 2139573 is about 1462.7279309564. The cubic root of 2139573 is about 128.8573026984.

The spelling of 2139573 in words is "two million, one hundred thirty-nine thousand, five hundred seventy-three".