147278442 has 8 divisors (see below), whose sum is σ = 294556896. Its totient is φ = 49092812.

The previous prime is 147278441. The next prime is 147278459. The reversal of 147278442 is 244872741.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

147278442 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 147278442.

It is not an unprimeable number, because it can be changed into a prime (147278441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12273198 + ... + 12273209.

It is an arithmetic number, because the mean of its divisors is an integer number (36819612).

Almost surely, 2^147278442 is an apocalyptic number.

147278442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

147278442 is a wasteful number, since it uses less digits than its factorization.

147278442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24546412.

The product of its digits is 100352, while the sum is 39.

The square root of 147278442 is about 12135.8329751196. The cubic root of 147278442 is about 528.0962218461.

The spelling of 147278442 in words is "one hundred forty-seven million, two hundred seventy-eight thousand, four hundred forty-two".