2122406 has 32 divisors (see below), whose sum is σ = 3852576. Its totient is φ = 864000.

The previous prime is 2122381. The next prime is 2122409. The reversal of 2122406 is 6042212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122409) 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, 11636 + ... + 11816.

It is an arithmetic number, because the mean of its divisors is an integer number (120393).

2^2122406 is an apocalyptic number.

2122406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2122406 is a deficient number, since it is larger than the sum of its proper divisors (1730170).

2122406 is a wasteful number, since it uses less digits than its factorization.

2122406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2122406 is about 1456.8479673597. The cubic root of 2122406 is about 128.5117452562.

Adding to 2122406 its reverse (6042212), we get a palindrome (8164618).

The spelling of 2122406 in words is "two million, one hundred twenty-two thousand, four hundred six".