172856006 has 4 divisors (see below), whose sum is σ = 259284012. Its totient is φ = 86428002.

The previous prime is 172856003. The next prime is 172856009. The reversal of 172856006 is 600658271.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (172856003) and next prime (172856009).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172856003) 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 as a sum of consecutive naturals, namely, 43214000 + ... + 43214003.

It is an arithmetic number, because the mean of its divisors is an integer number (64821003).

Almost surely, 2^172856006 is an apocalyptic number.

172856006 is a deficient number, since it is larger than the sum of its proper divisors (86428006).

172856006 is an equidigital number, since it uses as much as digits as its factorization.

172856006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86428005.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 172856006 is about 13147.4714679287. The cubic root of 172856006 is about 557.0508287244.

The spelling of 172856006 in words is "one hundred seventy-two million, eight hundred fifty-six thousand, six".