2120155 has 8 divisors (see below), whose sum is σ = 2693952. Its totient is φ = 1596288.

The previous prime is 2120147. The next prime is 2120171. The reversal of 2120155 is 5510212.

2120155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2120155 - 2³ = 2120147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12387 + ... + 12556.

It is an arithmetic number, because the mean of its divisors is an integer number (336744).

2^2120155 is an apocalyptic number.

2120155 is a deficient number, since it is larger than the sum of its proper divisors (573797).

2120155 is a wasteful number, since it uses less digits than its factorization.

2120155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24965.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2120155 is about 1456.0752041018. The cubic root of 2120155 is about 128.4662964797.

Adding to 2120155 its reverse (5510212), we get a palindrome (7630367).

The spelling of 2120155 in words is "two million, one hundred twenty thousand, one hundred fifty-five".