72102442 has 8 divisors (see below), whose sum is σ = 108201600. Its totient is φ = 36035244.

The previous prime is 72102413. The next prime is 72102449. The reversal of 72102442 is 24420127.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (72102449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192 + ... + 12067.

It is an arithmetic number, because the mean of its divisors is an integer number (13525200).

Almost surely, 2^72102442 is an apocalyptic number.

72102442 is a deficient number, since it is larger than the sum of its proper divisors (36099158).

72102442 is a wasteful number, since it uses less digits than its factorization.

72102442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15980.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 72102442 is about 8491.3156813300. The cubic root of 72102442 is about 416.2139747640.

Adding to 72102442 its reverse (24420127), we get a palindrome (96522569).

The spelling of 72102442 in words is "seventy-two million, one hundred two thousand, four hundred forty-two".