1924021 has 6 divisors (see below), whose sum is σ = 2114966. Its totient is φ = 1749000.

The previous prime is 1924003. The next prime is 1924031. The reversal of 1924021 is 1204291.

It can be written as a sum of positive squares in only one way, i.e., 1920996 + 3025 = 1386^2 + 55^2 .

It is not a de Polignac number, because 1924021 - 2⁵ = 1923989 is a prime.

It is a Duffinian number.

1924021 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1924021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1924031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7830 + ... + 8071.

2^1924021 is an apocalyptic number.

1924021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1924021 is a deficient number, since it is larger than the sum of its proper divisors (190945).

1924021 is a wasteful number, since it uses less digits than its factorization.

1924021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15923 (or 15912 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1924021 is about 1387.0908405725. The cubic root of 1924021 is about 124.3760048907.

The spelling of 1924021 in words is "one million, nine hundred twenty-four thousand, twenty-one".