1920434 has 4 divisors (see below), whose sum is σ = 2880654. Its totient is φ = 960216.

The previous prime is 1920433. The next prime is 1920437. The reversal of 1920434 is 4340291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4340291 = 43 ⋅100937.

It can be written as a sum of positive squares in only one way, i.e., 1918225 + 2209 = 1385^2 + 47^2 .

It is a super-3 number, since 3×1920434³ = 21248066333436919512, which contains 333 as substring.

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 as a sum of consecutive naturals, namely, 480107 + ... + 480110.

2^1920434 is an apocalyptic number.

1920434 is a deficient number, since it is larger than the sum of its proper divisors (960220).

1920434 is an equidigital number, since it uses as much as digits as its factorization.

1920434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960219.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1920434 is about 1385.7972434667. The cubic root of 1920434 is about 124.2986643862.

The spelling of 1920434 in words is "one million, nine hundred twenty thousand, four hundred thirty-four".