42127784 has 8 divisors (see below), whose sum is σ = 78989610. Its totient is φ = 21063888.

The previous prime is 42127783. The next prime is 42127823. The reversal of 42127784 is 48772124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 38167684 + 3960100 = 6178^2 + 1990^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (42127783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2632979 + ... + 2632994.

Almost surely, 2^42127784 is an apocalyptic number.

It is an amenable number.

42127784 is a deficient number, since it is larger than the sum of its proper divisors (36861826).

42127784 is a wasteful number, since it uses less digits than its factorization.

42127784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5265979 (or 5265975 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 42127784 is about 6490.5919606766. The cubic root of 42127784 is about 347.9548318530.

The spelling of 42127784 in words is "forty-two million, one hundred twenty-seven thousand, seven hundred eighty-four".