73072451 has 4 divisors (see below), whose sum is σ = 74627232. Its totient is φ = 71517672.

The previous prime is 73072427. The next prime is 73072457. The reversal of 73072451 is 15427037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15427037 = 2729 ⋅5653.

It is a cyclic number.

It is not a de Polignac number, because 73072451 - 2⁶ = 73072387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73072457) 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, 777320 + ... + 777413.

It is an arithmetic number, because the mean of its divisors is an integer number (18656808).

Almost surely, 2^73072451 is an apocalyptic number.

73072451 is a deficient number, since it is larger than the sum of its proper divisors (1554781).

73072451 is a wasteful number, since it uses less digits than its factorization.

73072451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554780.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 73072451 is about 8548.2425679200. The cubic root of 73072451 is about 418.0721375312.

Adding to 73072451 its reverse (15427037), we get a palindrome (88499488).

The spelling of 73072451 in words is "seventy-three million, seventy-two thousand, four hundred fifty-one".