2120145 has 16 divisors (see below), whose sum is σ = 3411072. Its totient is φ = 1124480.

The previous prime is 2120143. The next prime is 2120147. The reversal of 2120145 is 5410212.

It is an interprime number because it is at equal distance from previous prime (2120143) and next prime (2120147).

It is not a de Polignac number, because 2120145 - 2¹ = 2120143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (2120143) 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, 3964 + ... + 4466.

It is an arithmetic number, because the mean of its divisors is an integer number (213192).

2^2120145 is an apocalyptic number.

It is an amenable number.

2120145 is a deficient number, since it is larger than the sum of its proper divisors (1290927).

2120145 is a wasteful number, since it uses less digits than its factorization.

2120145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2120145 is about 1456.0717702091. The cubic root of 2120145 is about 128.4660945031.

Adding to 2120145 its reverse (5410212), we get a palindrome (7530357).

The spelling of 2120145 in words is "two million, one hundred twenty thousand, one hundred forty-five".