172235642 has 8 divisors (see below), whose sum is σ = 261624000. Its totient is φ = 85027644.

The previous prime is 172235641. The next prime is 172235647. The reversal of 172235642 is 246532271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 172235599 and 172235608.

It is not an unprimeable number, because it can be changed into a prime (172235641) 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 3 ways as a sum of consecutive naturals, for example, 544892 + ... + 545207.

It is an arithmetic number, because the mean of its divisors is an integer number (32703000).

Almost surely, 2^172235642 is an apocalyptic number.

172235642 is a deficient number, since it is larger than the sum of its proper divisors (89388358).

172235642 is a wasteful number, since it uses less digits than its factorization.

172235642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090180.

The product of its digits is 20160, while the sum is 32.

The square root of 172235642 is about 13123.8577407712. The cubic root of 172235642 is about 556.3836288475.

The spelling of 172235642 in words is "one hundred seventy-two million, two hundred thirty-five thousand, six hundred forty-two".