172142722 has 16 divisors (see below), whose sum is σ = 265541112. Its totient is φ = 83635200.

The previous prime is 172142713. The next prime is 172142779. The reversal of 172142722 is 227241271.

It can be written as a sum of positive squares in 4 ways, for example, as 130165281 + 41977441 = 11409^2 + 6479^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106722 + ... + 108322.

Almost surely, 2^172142722 is an apocalyptic number.

172142722 is a deficient number, since it is larger than the sum of its proper divisors (93398390).

172142722 is a wasteful number, since it uses less digits than its factorization.

172142722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3093.

The product of its digits is 3136, while the sum is 28.

The square root of 172142722 is about 13120.3171455571. The cubic root of 172142722 is about 556.2835557420.

Adding to 172142722 its reverse (227241271), we get a palindrome (399383993).

The spelling of 172142722 in words is "one hundred seventy-two million, one hundred forty-two thousand, seven hundred twenty-two".