72424542 has 48 divisors (see below), whose sum is σ = 158282640. Its totient is φ = 22063104.

The previous prime is 72424519. The next prime is 72424549. The reversal of 72424542 is 24542427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72424549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62238 + ... + 63390.

It is an arithmetic number, because the mean of its divisors is an integer number (3297555).

Almost surely, 2^72424542 is an apocalyptic number.

72424542 is an abundant number, since it is smaller than the sum of its proper divisors (85858098).

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

72424542 is a wasteful number, since it uses less digits than its factorization.

72424542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225 (or 1206 counting only the distinct ones).

The product of its digits is 17920, while the sum is 30.

The square root of 72424542 is about 8510.2609830721. The cubic root of 72424542 is about 416.8328321427.

Adding to 72424542 its reverse (24542427), we get a palindrome (96966969).

The spelling of 72424542 in words is "seventy-two million, four hundred twenty-four thousand, five hundred forty-two".