172401286 has 4 divisors (see below), whose sum is σ = 258601932. Its totient is φ = 86200642.

The previous prime is 172401263. The next prime is 172401287. The reversal of 172401286 is 682104271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 682104271 = 7577 ⋅90023.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172401287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43100320 + ... + 43100323.

It is an arithmetic number, because the mean of its divisors is an integer number (64650483).

Almost surely, 2^172401286 is an apocalyptic number.

172401286 is a deficient number, since it is larger than the sum of its proper divisors (86200646).

172401286 is an equidigital number, since it uses as much as digits as its factorization.

172401286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86200645.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 172401286 is about 13130.1670210245. The cubic root of 172401286 is about 556.5619351099.

The spelling of 172401286 in words is "one hundred seventy-two million, four hundred one thousand, two hundred eighty-six".