2120445 has 32 divisors (see below), whose sum is σ = 3830400. Its totient is φ = 1112832.

The previous prime is 2120429. The next prime is 2120453. The reversal of 2120445 is 5440212.

It is not a de Polignac number, because 2120445 - 2⁴ = 2120429 is a prime.

2120445 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15186 + ... + 15324.

It is an arithmetic number, because the mean of its divisors is an integer number (119700).

2^2120445 is an apocalyptic number.

It is an amenable number.

2120445 is a deficient number, since it is larger than the sum of its proper divisors (1709955).

2120445 is a wasteful number, since it uses less digits than its factorization.

2120445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 2120445 is about 1456.1747834652. The cubic root of 2120445 is about 128.4721535243.

Adding to 2120445 its reverse (5440212), we get a palindrome (7560657).

The spelling of 2120445 in words is "two million, one hundred twenty thousand, four hundred forty-five".