71724242 has 8 divisors (see below), whose sum is σ = 107751600. Its totient is φ = 35807044.

The previous prime is 71724223. The next prime is 71724269. The reversal of 71724242 is 24242717.

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

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, 25892 + ... + 28527.

It is an arithmetic number, because the mean of its divisors is an integer number (13468950).

Almost surely, 2^71724242 is an apocalyptic number.

71724242 is a deficient number, since it is larger than the sum of its proper divisors (36027358).

71724242 is a wasteful number, since it uses less digits than its factorization.

71724242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55080.

The product of its digits is 6272, while the sum is 29.

The square root of 71724242 is about 8469.0165898999. The cubic root of 71724242 is about 415.4849742332.

Adding to 71724242 its reverse (24242717), we get a palindrome (95966959).

The spelling of 71724242 in words is "seventy-one million, seven hundred twenty-four thousand, two hundred forty-two".