172140722 has 16 divisors (see below), whose sum is σ = 292709760. Its totient is φ = 75267792.

The previous prime is 172140679. The next prime is 172140751. The reversal of 172140722 is 227041271.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 172140691 and 172140700.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 173738 + ... + 174725.

It is an arithmetic number, because the mean of its divisors is an integer number (18294360).

Almost surely, 2^172140722 is an apocalyptic number.

172140722 is a deficient number, since it is larger than the sum of its proper divisors (120569038).

172140722 is a wasteful number, since it uses less digits than its factorization.

172140722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348497.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 172140722 is about 13120.2409276659. The cubic root of 172140722 is about 556.2814013835.

Adding to 172140722 its reverse (227041271), we get a palindrome (399181993).

The spelling of 172140722 in words is "one hundred seventy-two million, one hundred forty thousand, seven hundred twenty-two".