172249345 has 12 divisors (see below), whose sum is σ = 218152980. Its totient is φ = 130545504.

The previous prime is 172249333. The next prime is 172249351. The reversal of 172249345 is 543942271.

It can be written as a sum of positive squares in 2 ways, for example, as 104878081 + 67371264 = 10241^2 + 8208^2 .

It is not a de Polignac number, because 172249345 - 2²³ = 163860737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45910 + ... + 49519.

It is an arithmetic number, because the mean of its divisors is an integer number (18179415).

Almost surely, 2^172249345 is an apocalyptic number.

It is an amenable number.

172249345 is a deficient number, since it is larger than the sum of its proper divisors (45903635).

172249345 is an equidigital number, since it uses as much as digits as its factorization.

172249345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95472 (or 95453 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 172249345 is about 13124.3797948703. The cubic root of 172249345 is about 556.3983836771.

It can be divided in two parts, 17224 and 9345, that added together give a square (26569 = 163²).

The spelling of 172249345 in words is "one hundred seventy-two million, two hundred forty-nine thousand, three hundred forty-five".