42078272 has 14 divisors (see below), whose sum is σ = 83499198. Its totient is φ = 21039104.

The previous prime is 42078241. The next prime is 42078277. The reversal of 42078272 is 27287024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 35808256 + 6270016 = 5984^2 + 2504^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (42078277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328673 + ... + 328800.

Almost surely, 2^42078272 is an apocalyptic number.

It is an amenable number.

42078272 is a deficient number, since it is larger than the sum of its proper divisors (41420926).

42078272 is an equidigital number, since it uses as much as digits as its factorization.

42078272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657485 (or 657475 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 42078272 is about 6486.7767034175. The cubic root of 42078272 is about 347.8184634706.

The spelling of 42078272 in words is "forty-two million, seventy-eight thousand, two hundred seventy-two".