42191764 has 6 divisors (see below), whose sum is σ = 73835594. Its totient is φ = 21095880.

The previous prime is 42191741. The next prime is 42191789. The reversal of 42191764 is 46719124.

It can be written as a sum of positive squares in only one way, i.e., 37307664 + 4884100 = 6108^2 + 2210^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5273967 + ... + 5273974.

Almost surely, 2^42191764 is an apocalyptic number.

It is an amenable number.

42191764 is a deficient number, since it is larger than the sum of its proper divisors (31643830).

42191764 is a wasteful number, since it uses less digits than its factorization.

42191764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10547945 (or 10547943 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 42191764 is about 6495.5187629627. The cubic root of 42191764 is about 348.1308905613.

The spelling of 42191764 in words is "forty-two million, one hundred ninety-one thousand, seven hundred sixty-four".