72247045 has 8 divisors (see below), whose sum is σ = 93365496. Its totient is φ = 53351616.

The previous prime is 72247027. The next prime is 72247073. The reversal of 72247045 is 54074227.

It can be written as a sum of positive squares in 4 ways, for example, as 641601 + 71605444 = 801^2 + 8462^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72247045 is a prime.

It is a super-2 number, since 2×72247045² = 10439271022464050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72246998 and 72247016.

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, 555682 + ... + 555811.

It is an arithmetic number, because the mean of its divisors is an integer number (11670687).

Almost surely, 2^72247045 is an apocalyptic number.

It is an amenable number.

72247045 is a deficient number, since it is larger than the sum of its proper divisors (21118451).

72247045 is a wasteful number, since it uses less digits than its factorization.

72247045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111511.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 72247045 is about 8499.8261746932. The cubic root of 72247045 is about 416.4920309937.

The spelling of 72247045 in words is "seventy-two million, two hundred forty-seven thousand, forty-five".