72104451 has 4 divisors (see below), whose sum is σ = 96139272. Its totient is φ = 48069632.

The previous prime is 72104423. The next prime is 72104479. The reversal of 72104451 is 15440127.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (72104423) and next prime (72104479).

It is a cyclic number.

It is not a de Polignac number, because 72104451 - 2¹¹ = 72102403 is a prime.

It is a super-2 number, since 2×72104451² = 10398103708022802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72104491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12017406 + ... + 12017411.

It is an arithmetic number, because the mean of its divisors is an integer number (24034818).

Almost surely, 2^72104451 is an apocalyptic number.

72104451 is a deficient number, since it is larger than the sum of its proper divisors (24034821).

72104451 is a wasteful number, since it uses less digits than its factorization.

72104451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24034820.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 72104451 is about 8491.4339778391. The cubic root of 72104451 is about 416.2178404033.

Adding to 72104451 its reverse (15440127), we get a palindrome (87544578).

The spelling of 72104451 in words is "seventy-two million, one hundred four thousand, four hundred fifty-one".