172503045 has 72 divisors (see below), whose sum is σ = 354085368. Its totient is φ = 77172480.

The previous prime is 172503017. The next prime is 172503047. The reversal of 172503045 is 540305271.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25826724 + 146676321 = 5082^2 + 12111^2 .

It is not a de Polignac number, because 172503045 - 2⁸ = 172502789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172503047) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 69567 + ... + 72003.

Almost surely, 2^172503045 is an apocalyptic number.

172503045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172503045 is an abundant number, since it is smaller than the sum of its proper divisors (181582323).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172503045 is a wasteful number, since it uses less digits than its factorization.

172503045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 172503045 is about 13134.0414572210. The cubic root of 172503045 is about 556.6714162088.

The spelling of 172503045 in words is "one hundred seventy-two million, five hundred three thousand, forty-five".