72543000 has 64 divisors (see below), whose sum is σ = 226343520. Its totient is φ = 19344000.

The previous prime is 72542999. The next prime is 72543011. The reversal of 72543000 is 34527.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9091 + ... + 15090.

Almost surely, 2^72543000 is an apocalyptic number.

It is an amenable number.

72543000 is an abundant number, since it is smaller than the sum of its proper divisors (153800520).

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

72543000 is a wasteful number, since it uses less digits than its factorization.

72543000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24205 (or 24191 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 72543000 is about 8517.2178556146. The cubic root of 72543000 is about 417.0599664177.

Adding to 72543000 its reverse (34527), we get a palindrome (72577527).

The spelling of 72543000 in words is "seventy-two million, five hundred forty-three thousand".