172704942 has 24 divisors (see below), whose sum is σ = 382897944. Its totient is φ = 56229264.

The previous prime is 172704929. The next prime is 172704943. The reversal of 172704942 is 249407271.

It is a junction number, because it is equal to n+sod(n) for n = 172704897 and 172704906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172704943) 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 in 11 ways as a sum of consecutive naturals, for example, 110793 + ... + 112340.

It is an arithmetic number, because the mean of its divisors is an integer number (15954081).

Almost surely, 2^172704942 is an apocalyptic number.

172704942 is an abundant number, since it is smaller than the sum of its proper divisors (210193002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172704942 is a wasteful number, since it uses less digits than its factorization.

172704942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223184 (or 223181 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 172704942 is about 13141.7252292079. The cubic root of 172704942 is about 556.8885070053. Note that the first 3 decimals are identical.

The spelling of 172704942 in words is "one hundred seventy-two million, seven hundred four thousand, nine hundred forty-two".