172245745 has 32 divisors (see below), whose sum is σ = 243378432. Its totient is φ = 114573312.

The previous prime is 172245739. The next prime is 172245779. The reversal of 172245745 is 547542271.

It is not a de Polignac number, because 172245745 - 2⁹ = 172245233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 290169 + ... + 290761.

It is an arithmetic number, because the mean of its divisors is an integer number (7605576).

Almost surely, 2^172245745 is an apocalyptic number.

It is an amenable number.

172245745 is a deficient number, since it is larger than the sum of its proper divisors (71132687).

172245745 is a wasteful number, since it uses less digits than its factorization.

172245745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its digits is 78400, while the sum is 37.

The square root of 172245745 is about 13124.2426448157. The cubic root of 172245745 is about 556.3945074202.

The spelling of 172245745 in words is "one hundred seventy-two million, two hundred forty-five thousand, seven hundred forty-five".