73247145 has 16 divisors (see below), whose sum is σ = 117301632. Its totient is φ = 39029760.

The previous prime is 73247131. The next prime is 73247149. The reversal of 73247145 is 54174237.

It is not a de Polignac number, because 73247145 - 2⁶ = 73247081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73247149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30540 + ... + 32850.

It is an arithmetic number, because the mean of its divisors is an integer number (7331352).

Almost surely, 2^73247145 is an apocalyptic number.

It is an amenable number.

73247145 is a deficient number, since it is larger than the sum of its proper divisors (44054487).

73247145 is a wasteful number, since it uses less digits than its factorization.

73247145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432.

The product of its digits is 23520, while the sum is 33.

The square root of 73247145 is about 8558.4545918057. The cubic root of 73247145 is about 418.4050334856.

The spelling of 73247145 in words is "seventy-three million, two hundred forty-seven thousand, one hundred forty-five".