2120399 has 4 divisors (see below), whose sum is σ = 2133264. Its totient is φ = 2107536.

The previous prime is 2120387. The next prime is 2120411. The reversal of 2120399 is 9930212.

2120399 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 an interprime number because it is at equal distance from previous prime (2120387) and next prime (2120411).

It is a cyclic number.

It is not a de Polignac number, because 2120399 - 2⁴ = 2120383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120309) 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, 6182 + ... + 6515.

It is an arithmetic number, because the mean of its divisors is an integer number (533316).

2^2120399 is an apocalyptic number.

2120399 is a deficient number, since it is larger than the sum of its proper divisors (12865).

2120399 is a wasteful number, since it uses less digits than its factorization.

2120399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12864.

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

The square root of 2120399 is about 1456.1589885723. The cubic root of 2120399 is about 128.4712245115.

The spelling of 2120399 in words is "two million, one hundred twenty thousand, three hundred ninety-nine".