1916242 has 4 divisors (see below), whose sum is σ = 2874366. Its totient is φ = 958120.

The previous prime is 1916231. The next prime is 1916249. The reversal of 1916242 is 2426191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2426191 = 809 ⋅2999.

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 641601 = 1129^2 + 801^2 .

It is not an unprimeable number, because it can be changed into a prime (1916249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 479059 + ... + 479062.

2^1916242 is an apocalyptic number.

1916242 is a deficient number, since it is larger than the sum of its proper divisors (958124).

1916242 is an equidigital number, since it uses as much as digits as its factorization.

1916242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958123.

The product of its digits is 864, while the sum is 25.

The square root of 1916242 is about 1384.2839304131. The cubic root of 1916242 is about 124.2081571377.

It can be divided in two parts, 19 and 16242, that added together give a palindrome (16261).

The spelling of 1916242 in words is "one million, nine hundred sixteen thousand, two hundred forty-two".