42447556 has 12 divisors (see below), whose sum is σ = 76679680. Its totient is φ = 20539080.

The previous prime is 42447551. The next prime is 42447583. The reversal of 42447556 is 65574424.

It is not an unprimeable number, because it can be changed into a prime (42447551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171036 + ... + 171283.

Almost surely, 2^42447556 is an apocalyptic number.

It is an amenable number.

42447556 is a deficient number, since it is larger than the sum of its proper divisors (34232124).

42447556 is a wasteful number, since it uses less digits than its factorization.

42447556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342354 (or 342352 counting only the distinct ones).

The product of its digits is 134400, while the sum is 37.

The square root of 42447556 is about 6515.1788924020. The cubic root of 42447556 is about 348.8330002900.

The spelling of 42447556 in words is "forty-two million, four hundred forty-seven thousand, five hundred fifty-six".