42219794 has 4 divisors (see below), whose sum is σ = 63329694. Its totient is φ = 21109896.

The previous prime is 42219781. The next prime is 42219797. The reversal of 42219794 is 49791224.

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., 35844169 + 6375625 = 5987^2 + 2525^2 .

It is a super-2 number, since 2×42219794² = 3565022010804872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42219797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10554947 + ... + 10554950.

Almost surely, 2^42219794 is an apocalyptic number.

42219794 is a deficient number, since it is larger than the sum of its proper divisors (21109900).

42219794 is a wasteful number, since it uses less digits than its factorization.

42219794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21109899.

The product of its digits is 36288, while the sum is 38.

The square root of 42219794 is about 6497.6760460952. The cubic root of 42219794 is about 348.2079668104.

The spelling of 42219794 in words is "forty-two million, two hundred nineteen thousand, seven hundred ninety-four".