172540606 has 32 divisors (see below), whose sum is σ = 307169280. Its totient is φ = 71128800.

The previous prime is 172540601. The next prime is 172540703. The reversal of 172540606 is 606045271.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172540601) 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 15 ways as a sum of consecutive naturals, for example, 76576 + ... + 78796.

It is an arithmetic number, because the mean of its divisors is an integer number (9599040).

Almost surely, 2^172540606 is an apocalyptic number.

172540606 is a deficient number, since it is larger than the sum of its proper divisors (134628674).

172540606 is a wasteful number, since it uses less digits than its factorization.

172540606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 172540606 is about 13135.4712896036. The cubic root of 172540606 is about 556.7118166892.

Adding to 172540606 its reverse (606045271), we get a palindrome (778585877).

The spelling of 172540606 in words is "one hundred seventy-two million, five hundred forty thousand, six hundred six".