172144406 has 16 divisors (see below), whose sum is σ = 305281440. Its totient is φ = 71232000.

The previous prime is 172144403. The next prime is 172144421. The reversal of 172144406 is 604441271.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172144403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211595 + ... + 212406.

It is an arithmetic number, because the mean of its divisors is an integer number (19080090).

Almost surely, 2^172144406 is an apocalyptic number.

172144406 is a deficient number, since it is larger than the sum of its proper divisors (133137034).

172144406 is a wasteful number, since it uses less digits than its factorization.

172144406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424039.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 172144406 is about 13120.3813206781. The cubic root of 172144406 is about 556.2853696989.

Adding to 172144406 its reverse (604441271), we get a palindrome (776585677).

The spelling of 172144406 in words is "one hundred seventy-two million, one hundred forty-four thousand, four hundred six".