13172445 has 96 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 5575680.

The previous prime is 13172441. The next prime is 13172473. The reversal of 13172445 is 54427131.

It is not a de Polignac number, because 13172445 - 2² = 13172441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13172441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 147961 + ... + 148049.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

Almost surely, 2^13172445 is an apocalyptic number.

13172445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13172445 is an abundant number, since it is smaller than the sum of its proper divisors (15132195).

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

13172445 is a wasteful number, since it uses less digits than its factorization.

13172445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 144 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 13172445 is about 3629.3863117613. The cubic root of 13172445 is about 236.1685870483.

Adding to 13172445 its reverse (54427131), we get a palindrome (67599576).

It can be divided in two parts, 131724 and 45, that added together give a square (131769 = 363²).

The spelling of 13172445 in words is "thirteen million, one hundred seventy-two thousand, four hundred forty-five".