172401404 has 60 divisors (see below), whose sum is σ = 364690200. Its totient is φ = 71223264.

The previous prime is 172401391. The next prime is 172401407. The reversal of 172401404 is 404104271.

It is a happy number.

172401404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 172401404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172401407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 278207 + ... + 278825.

It is an arithmetic number, because the mean of its divisors is an integer number (6078170).

Almost surely, 2^172401404 is an apocalyptic number.

172401404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172401404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182345100).

172401404 is an abundant number, since it is smaller than the sum of its proper divisors (192288796).

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

172401404 is an equidigital number, since it uses as much as digits as its factorization.

172401404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 172401404 is about 13130.1715144929. The cubic root of 172401404 is about 556.5620620894.

Adding to 172401404 its reverse (404104271), we get a palindrome (576505675).

The spelling of 172401404 in words is "one hundred seventy-two million, four hundred one thousand, four hundred four".