2120751 has 12 divisors (see below), whose sum is σ = 3109912. Its totient is φ = 1392336.

The previous prime is 2120747. The next prime is 2120753. The reversal of 2120751 is 1570212.

It is not a de Polignac number, because 2120751 - 2² = 2120747 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 (2120753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1156 + ... + 2361.

2^2120751 is an apocalyptic number.

2120751 is a deficient number, since it is larger than the sum of its proper divisors (989161).

2120751 is a wasteful number, since it uses less digits than its factorization.

2120751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590 (or 3587 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2120751 is about 1456.2798494795. The cubic root of 2120751 is about 128.4783331372.

Adding to 2120751 its reverse (1570212), we get a palindrome (3690963).

The spelling of 2120751 in words is "two million, one hundred twenty thousand, seven hundred fifty-one".