2169442 has 16 divisors (see below), whose sum is σ = 3665664. Its totient is φ = 954000.

The previous prime is 2169397. The next prime is 2169443. The reversal of 2169442 is 2449612.

It is a self number, because there is not a number n which added to its sum of digits gives 2169442.

It is not an unprimeable number, because it can be changed into a prime (2169443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909 + ... + 2272.

It is an arithmetic number, because the mean of its divisors is an integer number (229104).

2^2169442 is an apocalyptic number.

2169442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2169442 is a deficient number, since it is larger than the sum of its proper divisors (1496222).

2169442 is a wasteful number, since it uses less digits than its factorization.

2169442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225.

The product of its digits is 3456, while the sum is 28.

The square root of 2169442 is about 1472.9025765474. The cubic root of 2169442 is about 129.4541610645.

It can be divided in two parts, 21694 and 42, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 2169442 in words is "two million, one hundred sixty-nine thousand, four hundred forty-two".