172137601 has 8 divisors (see below), whose sum is σ = 174623904. Its totient is φ = 169661280.

The previous prime is 172137593. The next prime is 172137611. The reversal of 172137601 is 106731271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172137601 - 2³ = 172137593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172137601.

It is not an unprimeable number, because it can be changed into a prime (172137611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36541 + ... + 40981.

It is an arithmetic number, because the mean of its divisors is an integer number (21827988).

Almost surely, 2^172137601 is an apocalyptic number.

It is an amenable number.

172137601 is a deficient number, since it is larger than the sum of its proper divisors (2486303).

172137601 is an equidigital number, since it uses as much as digits as its factorization.

172137601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4991.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 172137601 is about 13120.1219887621. The cubic root of 172137601 is about 556.2780394737.

Adding to 172137601 its reverse (106731271), we get a palindrome (278868872).

The spelling of 172137601 in words is "one hundred seventy-two million, one hundred thirty-seven thousand, six hundred one".