4122639 has 12 divisors (see below), whose sum is σ = 6268600. Its totient is φ = 2603664.

The previous prime is 4122631. The next prime is 4122641. The reversal of 4122639 is 9362214.

4122639 is a `hidden beast` number, since 4 + 1 + 22 + 639 = 666.

It is not a de Polignac number, because 4122639 - 2³ = 4122631 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4122631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11884 + ... + 12225.

Almost surely, 2^4122639 is an apocalyptic number.

4122639 is a deficient number, since it is larger than the sum of its proper divisors (2145961).

4122639 is a wasteful number, since it uses less digits than its factorization.

4122639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24134 (or 24131 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 4122639 is about 2030.4282799449. The cubic root of 4122639 is about 160.3461127267.

It can be divided in two parts, 4122 and 639, that added together give a square (4761 = 69²).

The spelling of 4122639 in words is "four million, one hundred twenty-two thousand, six hundred thirty-nine".