172164742 has 8 divisors (see below), whose sum is σ = 261358776. Its totient is φ = 85045152.

The previous prime is 172164739. The next prime is 172164743. The reversal of 172164742 is 247461271.

It is a happy number.

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 = 172164698 and 172164707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172164743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518403 + ... + 518734.

It is an arithmetic number, because the mean of its divisors is an integer number (32669847).

Almost surely, 2^172164742 is an apocalyptic number.

172164742 is a deficient number, since it is larger than the sum of its proper divisors (89194034).

172164742 is a wasteful number, since it uses less digits than its factorization.

172164742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037222.

The product of its digits is 18816, while the sum is 34.

The square root of 172164742 is about 13121.1562752678. The cubic root of 172164742 is about 556.3072741261.

The spelling of 172164742 in words is "one hundred seventy-two million, one hundred sixty-four thousand, seven hundred forty-two".