172477442 has 16 divisors (see below), whose sum is σ = 267953400. Its totient is φ = 83166720.

The previous prime is 172477441. The next prime is 172477477. The reversal of 172477442 is 244774271.

It can be written as a sum of positive squares in 4 ways, for example, as 100380361 + 72097081 = 10019^2 + 8491^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172477396 and 172477405.

It is not an unprimeable number, because it can be changed into a prime (172477441) by changing a digit.

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, 81842 + ... + 83922.

Almost surely, 2^172477442 is an apocalyptic number.

172477442 is a deficient number, since it is larger than the sum of its proper divisors (95475958).

172477442 is a wasteful number, since it uses less digits than its factorization.

172477442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541.

The product of its digits is 87808, while the sum is 38.

The square root of 172477442 is about 13133.0667401030. The cubic root of 172477442 is about 556.6438743502.

The spelling of 172477442 in words is "one hundred seventy-two million, four hundred seventy-seven thousand, four hundred forty-two".