172103424 has 72 divisors (see below), whose sum is σ = 460267920. Its totient is φ = 57090048.

The previous prime is 172103389. The next prime is 172103431. The reversal of 172103424 is 424301271.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 172103394 and 172103403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212332 + ... + 213140.

It is an arithmetic number, because the mean of its divisors is an integer number (6392610).

Almost surely, 2^172103424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172103424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230133960).

172103424 is an abundant number, since it is smaller than the sum of its proper divisors (288164496).

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

172103424 is an equidigital number, since it uses as much as digits as its factorization.

172103424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 172103424 is about 13118.8194590824. The cubic root of 172103424 is about 556.2412216937.

Adding to 172103424 its reverse (424301271), we get a palindrome (596404695).

The spelling of 172103424 in words is "one hundred seventy-two million, one hundred three thousand, four hundred twenty-four".