1939442 has 4 divisors (see below), whose sum is σ = 2909166. Its totient is φ = 969720.

The previous prime is 1939439. The next prime is 1939447. The reversal of 1939442 is 2449391.

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: 2449391 = 7 ⋅349913.

It can be written as a sum of positive squares in only one way, i.e., 1635841 + 303601 = 1279^2 + 551^2 .

It is a super-2 number, since 2×1939442² = 7522870542728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1939399 and 1939408.

It is not an unprimeable number, because it can be changed into a prime (1939447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484859 + ... + 484862.

2^1939442 is an apocalyptic number.

1939442 is a deficient number, since it is larger than the sum of its proper divisors (969724).

1939442 is an equidigital number, since it uses as much as digits as its factorization.

1939442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969723.

The product of its digits is 7776, while the sum is 32.

The square root of 1939442 is about 1392.6385029863. The cubic root of 1939442 is about 124.7074116709.

The spelling of 1939442 in words is "one million, nine hundred thirty-nine thousand, four hundred forty-two".