172860401 has 8 divisors (see below), whose sum is σ = 201282624. Its totient is φ = 145370160.

The previous prime is 172860377. The next prime is 172860419. The reversal of 172860401 is 104068271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172860401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172860481) 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, 232595 + ... + 233336.

It is an arithmetic number, because the mean of its divisors is an integer number (25160328).

Almost surely, 2^172860401 is an apocalyptic number.

It is an amenable number.

172860401 is a deficient number, since it is larger than the sum of its proper divisors (28422223).

172860401 is an equidigital number, since it uses as much as digits as its factorization.

172860401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465991.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 172860401 is about 13147.6386092712. The cubic root of 172860401 is about 557.0555498363.

The spelling of 172860401 in words is "one hundred seventy-two million, eight hundred sixty thousand, four hundred one".