1920291 has 8 divisors (see below), whose sum is σ = 2568960. Its totient is φ = 1275912.

The previous prime is 1920283. The next prime is 1920299.

1920291 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1920283) and next prime (1920299).

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

It is not a de Polignac number, because 1920291 - 2³ = 1920283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1920299) 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 7 ways as a sum of consecutive naturals, for example, 186 + ... + 1968.

It is an arithmetic number, because the mean of its divisors is an integer number (321120).

2^1920291 is an apocalyptic number.

1920291 is a deficient number, since it is larger than the sum of its proper divisors (648669).

1920291 is a wasteful number, since it uses less digits than its factorization.

1920291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1920291 is about 1385.7456476569. The cubic root of 1920291 is about 124.2955791200.

It can be divided in two parts, 1920 and 291, that added together give a triangular number (2211 = T₆₆).

The spelling of 1920291 in words is "one million, nine hundred twenty thousand, two hundred ninety-one".