72005542 has 8 divisors (see below), whose sum is σ = 123438096. Its totient is φ = 30859512.

The previous prime is 72005537. The next prime is 72005567. The reversal of 72005542 is 24550027.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2571613 + ... + 2571640.

It is an arithmetic number, because the mean of its divisors is an integer number (15429762).

Almost surely, 2^72005542 is an apocalyptic number.

72005542 is a deficient number, since it is larger than the sum of its proper divisors (51432554).

72005542 is a wasteful number, since it uses less digits than its factorization.

72005542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143262.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 72005542 is about 8485.6079334365. The cubic root of 72005542 is about 416.0274382481.

Adding to 72005542 its reverse (24550027), we get a palindrome (96555569).

The spelling of 72005542 in words is "seventy-two million, five thousand, five hundred forty-two".