2123407 has 16 divisors (see below), whose sum is σ = 2580480. Its totient is φ = 1720800.

The previous prime is 2123377. The next prime is 2123411. The reversal of 2123407 is 7043212.

It is a cyclic number.

It is not a de Polignac number, because 2123407 - 2⁷ = 2123279 is a prime.

It is a Duffinian number.

2123407 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123707) 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, 4194 + ... + 4672.

It is an arithmetic number, because the mean of its divisors is an integer number (161280).

2^2123407 is an apocalyptic number.

2123407 is a deficient number, since it is larger than the sum of its proper divisors (457073).

2123407 is a wasteful number, since it uses less digits than its factorization.

2123407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 2123407 is about 1457.1914767799. The cubic root of 2123407 is about 128.5319456072.

Adding to 2123407 its reverse (7043212), we get a palindrome (9166619).

The spelling of 2123407 in words is "two million, one hundred twenty-three thousand, four hundred seven".