1920423 has 8 divisors (see below), whose sum is σ = 2620288. Its totient is φ = 1250424.

The previous prime is 1920407. The next prime is 1920427. The reversal of 1920423 is 3240291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1920423 - 2⁴ = 1920407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1920423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920427) 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 7 ways as a sum of consecutive naturals, for example, 7315 + ... + 7572.

It is an arithmetic number, because the mean of its divisors is an integer number (327536).

2^1920423 is an apocalyptic number.

1920423 is a deficient number, since it is larger than the sum of its proper divisors (699865).

1920423 is a wasteful number, since it uses less digits than its factorization.

1920423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14933.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1920423 is about 1385.7932746265. The cubic root of 1920423 is about 124.2984270634.

The spelling of 1920423 in words is "one million, nine hundred twenty thousand, four hundred twenty-three".