42445546 has 16 divisors (see below), whose sum is σ = 74799648. Its totient is φ = 17809200.

The previous prime is 42445523. The next prime is 42445547. The reversal of 42445546 is 64554424.

It is not an unprimeable number, because it can be changed into a prime (42445547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73920 + ... + 74491.

It is an arithmetic number, because the mean of its divisors is an integer number (4674978).

Almost surely, 2^42445546 is an apocalyptic number.

42445546 is a deficient number, since it is larger than the sum of its proper divisors (32354102).

42445546 is a wasteful number, since it uses less digits than its factorization.

42445546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148437.

The product of its digits is 76800, while the sum is 34.

The square root of 42445546 is about 6515.0246354101. The cubic root of 42445546 is about 348.8274941591.

The spelling of 42445546 in words is "forty-two million, four hundred forty-five thousand, five hundred forty-six".