1920439 has 4 divisors (see below), whose sum is σ = 2033424. Its totient is φ = 1807456.

The previous prime is 1920437. The next prime is 1920469. The reversal of 1920439 is 9340291.

1920439 = T₁₁₃₀ + T₁₁₃₁ + T₁₁₃₂.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9340291 = 29 ⋅322079.

It is a cyclic number.

It is not a de Polignac number, because 1920439 - 2¹ = 1920437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56467 + ... + 56500.

It is an arithmetic number, because the mean of its divisors is an integer number (508356).

2^1920439 is an apocalyptic number.

1920439 is the 1132-nd centered triangular number.

1920439 is a deficient number, since it is larger than the sum of its proper divisors (112985).

1920439 is a wasteful number, since it uses less digits than its factorization.

1920439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112984.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1920439 is about 1385.7990474813. The cubic root of 1920439 is about 124.2987722598.

The spelling of 1920439 in words is "one million, nine hundred twenty thousand, four hundred thirty-nine".