1920029 has 4 divisors (see below), whose sum is σ = 1926876. Its totient is φ = 1913184.

The previous prime is 1920013. The next prime is 1920043. The reversal of 1920029 is 9200291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9200291 = 317 ⋅29023.

It can be written as a sum of positive squares in 2 ways, for example, as 1322500 + 597529 = 1150^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920029 - 2⁴ = 1920013 is a prime.

It is a super-2 number, since 2×1920029² = 7373022721682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1919986 and 1920013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2984 + ... + 3569.

It is an arithmetic number, because the mean of its divisors is an integer number (481719).

2^1920029 is an apocalyptic number.

It is an amenable number.

1920029 is a deficient number, since it is larger than the sum of its proper divisors (6847).

1920029 is an equidigital number, since it uses as much as digits as its factorization.

1920029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6846.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1920029 is about 1385.6511104892. The cubic root of 1920029 is about 124.2899259971.

The spelling of 1920029 in words is "one million, nine hundred twenty thousand, twenty-nine".