72747245 has 8 divisors (see below), whose sum is σ = 87496416. Its totient is φ = 58064656.

The previous prime is 72747223. The next prime is 72747263. The reversal of 72747245 is 54274727.

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

It is a cyclic number.

It is not a de Polignac number, because 72747245 - 2¹² = 72743149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72747199 and 72747208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14207 + ... + 18636.

It is an arithmetic number, because the mean of its divisors is an integer number (10937052).

Almost surely, 2^72747245 is an apocalyptic number.

It is an amenable number.

72747245 is a deficient number, since it is larger than the sum of its proper divisors (14749171).

72747245 is a wasteful number, since it uses less digits than its factorization.

72747245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33291.

The product of its digits is 109760, while the sum is 38.

The square root of 72747245 is about 8529.1995521268. The cubic root of 72747245 is about 417.4510107817.

The spelling of 72747245 in words is "seventy-two million, seven hundred forty-seven thousand, two hundred forty-five".