2123445 has 16 divisors (see below), whose sum is σ = 3462912. Its totient is φ = 1110720.

The previous prime is 2123423. The next prime is 2123461. The reversal of 2123445 is 5443212.

It is not a de Polignac number, because 2123445 - 2¹⁷ = 1992373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541 + ... + 2130.

It is an arithmetic number, because the mean of its divisors is an integer number (216432).

2^2123445 is an apocalyptic number.

It is an amenable number.

2123445 is a deficient number, since it is larger than the sum of its proper divisors (1339467).

2123445 is a wasteful number, since it uses less digits than its factorization.

2123445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732.

The product of its digits is 960, while the sum is 21.

The square root of 2123445 is about 1457.2045155022. The cubic root of 2123445 is about 128.5327123286.

Adding to 2123445 its reverse (5443212), we get a palindrome (7566657).

The spelling of 2123445 in words is "two million, one hundred twenty-three thousand, four hundred forty-five".