2120045 has 8 divisors (see below), whose sum is σ = 2631960. Its totient is φ = 1637440.

The previous prime is 2120021. The next prime is 2120051. The reversal of 2120045 is 5400212.

It can be written as a sum of positive squares in 4 ways, for example, as 5929 + 2114116 = 77^2 + 1454^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-2120045 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7166 + ... + 7455.

It is an arithmetic number, because the mean of its divisors is an integer number (328995).

2^2120045 is an apocalyptic number.

It is an amenable number.

2120045 is a deficient number, since it is larger than the sum of its proper divisors (511915).

2120045 is a wasteful number, since it uses less digits than its factorization.

2120045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14655.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2120045 is about 1456.0374308375. The cubic root of 2120045 is about 128.4640747023.

Adding to 2120045 its reverse (5400212), we get a palindrome (7520257).

The spelling of 2120045 in words is "two million, one hundred twenty thousand, forty-five".