72147142 has 8 divisors (see below), whose sum is σ = 113916600. Its totient is φ = 34174944.

The previous prime is 72147107. The next prime is 72147181. The reversal of 72147142 is 24174127.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72147142.

It is a congruent number.

It is an unprimeable number.

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, 949267 + ... + 949342.

It is an arithmetic number, because the mean of its divisors is an integer number (14239575).

Almost surely, 2^72147142 is an apocalyptic number.

72147142 is a deficient number, since it is larger than the sum of its proper divisors (41769458).

72147142 is a wasteful number, since it uses less digits than its factorization.

72147142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898630.

The product of its digits is 3136, while the sum is 28.

The square root of 72147142 is about 8493.9473744544. The cubic root of 72147142 is about 416.2999677891.

The spelling of 72147142 in words is "seventy-two million, one hundred forty-seven thousand, one hundred forty-two".