1442721194 has 4 divisors (see below), whose sum is σ = 2164081794. Its totient is φ = 721360596.

The previous prime is 1442721193. The next prime is 1442721223. The reversal of 1442721194 is 4911272441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 993069169 + 449652025 = 31513^2 + 21205^2 .

It is not an unprimeable number, because it can be changed into a prime (1442721193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360680297 + ... + 360680300.

Almost surely, 2^1442721194 is an apocalyptic number.

1442721194 is a deficient number, since it is larger than the sum of its proper divisors (721360600).

1442721194 is an equidigital number, since it uses as much as digits as its factorization.

1442721194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721360599.

The product of its digits is 16128, while the sum is 35.

The square root of 1442721194 is about 37983.1698782500. The cubic root of 1442721194 is about 1129.9541041740.

The spelling of 1442721194 in words is "one billion, four hundred forty-two million, seven hundred twenty-one thousand, one hundred ninety-four".