2120357 has 4 divisors (see below), whose sum is σ = 2123916. Its totient is φ = 2116800.

The previous prime is 2120353. The next prime is 2120383. The reversal of 2120357 is 7530212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1196836 + 923521 = 1094^2 + 961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120357 - 2² = 2120353 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 (2120351) 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, 644 + ... + 2157.

It is an arithmetic number, because the mean of its divisors is an integer number (530979).

2^2120357 is an apocalyptic number.

It is an amenable number.

2120357 is a deficient number, since it is larger than the sum of its proper divisors (3559).

2120357 is an equidigital number, since it uses as much as digits as its factorization.

2120357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3558.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 2120357 is about 1456.1445669988. The cubic root of 2120357 is about 128.4703762706.

Adding to 2120357 its reverse (7530212), we get a palindrome (9650569).

The spelling of 2120357 in words is "two million, one hundred twenty thousand, three hundred fifty-seven".