4122789 has 16 divisors (see below), whose sum is σ = 6350400. Its totient is φ = 2351360.

The previous prime is 4122779. The next prime is 4122827. The reversal of 4122789 is 9872214.

It is a happy number.

It is not a de Polignac number, because 4122789 - 2⁷ = 4122661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4122709) 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 15 ways as a sum of consecutive naturals, for example, 3114 + ... + 4235.

It is an arithmetic number, because the mean of its divisors is an integer number (396900).

Almost surely, 2^4122789 is an apocalyptic number.

It is an amenable number.

4122789 is a deficient number, since it is larger than the sum of its proper divisors (2227611).

4122789 is a wasteful number, since it uses less digits than its factorization.

4122789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380.

The product of its digits is 8064, while the sum is 33.

The square root of 4122789 is about 2030.4652176287. The cubic root of 4122789 is about 160.3480574054.

Subtracting from 4122789 its sum of digits (33), we obtain a triangular number (4122756 = T₂₈₇₁).

The spelling of 4122789 in words is "four million, one hundred twenty-two thousand, seven hundred eighty-nine".