42551756 has 12 divisors (see below), whose sum is σ = 80193792. Its totient is φ = 19639248.

The previous prime is 42551749. The next prime is 42551759. The reversal of 42551756 is 65715524.

It is not an unprimeable number, because it can be changed into a prime (42551759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409100 + ... + 409203.

It is an arithmetic number, because the mean of its divisors is an integer number (6682816).

Almost surely, 2^42551756 is an apocalyptic number.

It is an amenable number.

42551756 is a deficient number, since it is larger than the sum of its proper divisors (37642036).

42551756 is a wasteful number, since it uses less digits than its factorization.

42551756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818320 (or 818318 counting only the distinct ones).

The product of its digits is 42000, while the sum is 35.

The square root of 42551756 is about 6523.1707014304. The cubic root of 42551756 is about 349.1182047473.

The spelling of 42551756 in words is "forty-two million, five hundred fifty-one thousand, seven hundred fifty-six".