72501307 has 4 divisors (see below), whose sum is σ = 74043936. Its totient is φ = 70958680.

The previous prime is 72501301. The next prime is 72501323. The reversal of 72501307 is 70310527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70310527 = 7 ⋅10044361.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72501307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72501301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771244 + ... + 771337.

It is an arithmetic number, because the mean of its divisors is an integer number (18510984).

Almost surely, 2^72501307 is an apocalyptic number.

72501307 is a deficient number, since it is larger than the sum of its proper divisors (1542629).

72501307 is a wasteful number, since it uses less digits than its factorization.

72501307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542628.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 72501307 is about 8514.7699323000. The cubic root of 72501307 is about 416.9800514546.

The spelling of 72501307 in words is "seventy-two million, five hundred one thousand, three hundred seven".