72411321 has 8 divisors (see below), whose sum is σ = 97770880. Its totient is φ = 47662992.

The previous prime is 72411281. The next prime is 72411323. The reversal of 72411321 is 12311427.

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

It is not a de Polignac number, because 72411321 - 2⁹ = 72410809 is a prime.

It is a super-3 number, since 3×72411321³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72411323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152530 + ... + 153003.

It is an arithmetic number, because the mean of its divisors is an integer number (12221360).

Almost surely, 2^72411321 is an apocalyptic number.

It is an amenable number.

72411321 is a deficient number, since it is larger than the sum of its proper divisors (25359559).

72411321 is a wasteful number, since it uses less digits than its factorization.

72411321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305615.

The product of its digits is 336, while the sum is 21.

The square root of 72411321 is about 8509.4841794318. The cubic root of 72411321 is about 416.8074665134.

Adding to 72411321 its reverse (12311427), we get a palindrome (84722748).

The spelling of 72411321 in words is "seventy-two million, four hundred eleven thousand, three hundred twenty-one".