2120690 has 32 divisors (see below), whose sum is σ = 4487616. Its totient is φ = 711360.

The previous prime is 2120653. The next prime is 2120693. The reversal of 2120690 is 960212.

2120690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2120690² = 8994652152200, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2120693) 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 15 ways as a sum of consecutive naturals, for example, 689 + ... + 2171.

It is an arithmetic number, because the mean of its divisors is an integer number (140238).

2^2120690 is an apocalyptic number.

2120690 is an abundant number, since it is smaller than the sum of its proper divisors (2366926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2120690 is a wasteful number, since it uses less digits than its factorization.

2120690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2120690 is about 1456.2589055522. The cubic root of 2120690 is about 128.4771013011.

The spelling of 2120690 in words is "two million, one hundred twenty thousand, six hundred ninety".