2120545 has 16 divisors (see below), whose sum is σ = 2977920. Its totient is φ = 1419264.

The previous prime is 2120537. The next prime is 2120549. The reversal of 2120545 is 5450212.

It is not a de Polignac number, because 2120545 - 2³ = 2120537 is a prime.

It is a super-2 number, since 2×2120545² = 8993422194050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2120549) 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, 801 + ... + 2209.

It is an arithmetic number, because the mean of its divisors is an integer number (186120).

2^2120545 is an apocalyptic number.

It is an amenable number.

2120545 is a deficient number, since it is larger than the sum of its proper divisors (857375).

2120545 is a wasteful number, since it uses less digits than its factorization.

2120545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2120545 is about 1456.2091195979. The cubic root of 2120545 is about 128.4741730710.

Adding to 2120545 its reverse (5450212), we get a palindrome (7570757).

The spelling of 2120545 in words is "two million, one hundred twenty thousand, five hundred forty-five".