2120757 has 4 divisors (see below), whose sum is σ = 2827680. Its totient is φ = 1413836.

The previous prime is 2120753. The next prime is 2120771. The reversal of 2120757 is 7570212.

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 a cyclic number.

It is not a de Polignac number, because 2120757 - 2² = 2120753 is a prime.

It is a super-2 number, since 2×2120757² = 8995220506098, which contains 22 as substring.

It is a D-number.

2120757 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120753) 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, 353457 + ... + 353462.

It is an arithmetic number, because the mean of its divisors is an integer number (706920).

2^2120757 is an apocalyptic number.

It is an amenable number.

2120757 is a deficient number, since it is larger than the sum of its proper divisors (706923).

2120757 is an equidigital number, since it uses as much as digits as its factorization.

2120757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706922.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 2120757 is about 1456.2819095216. The cubic root of 2120757 is about 128.4784543002.

Adding to 2120757 its reverse (7570212), we get a palindrome (9690969).

The spelling of 2120757 in words is "two million, one hundred twenty thousand, seven hundred fifty-seven".