2120655 has 16 divisors (see below), whose sum is σ = 3485664. Its totient is φ = 1100160.

The previous prime is 2120653. The next prime is 2120693. The reversal of 2120655 is 5560212.

2120655 is nontrivially palindromic in base 9.

It is not a de Polignac number, because 2120655 - 2¹ = 2120653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1356 + ... + 2465.

It is an arithmetic number, because the mean of its divisors is an integer number (217854).

2^2120655 is an apocalyptic number.

2120655 is a deficient number, since it is larger than the sum of its proper divisors (1365009).

2120655 is a wasteful number, since it uses less digits than its factorization.

2120655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3866.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2120655 is about 1456.2468884087. The cubic root of 2120655 is about 128.4763944991.

Adding to 2120655 its reverse (5560212), we get a palindrome (7680867).

It can be divided in two parts, 2120 and 655, that added together give a triangular number (2775 = T₇₄).

The spelling of 2120655 in words is "two million, one hundred twenty thousand, six hundred fifty-five".