75172442 has 8 divisors (see below), whose sum is σ = 113331636. Its totient is φ = 37395232.

The previous prime is 75172423. The next prime is 75172463. The reversal of 75172442 is 24427157.

It can be written as a sum of positive squares in 2 ways, for example, as 57775201 + 17397241 = 7601^2 + 4171^2 .

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 = 75172399 and 75172408.

It is an unprimeable number.

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, 95003 + ... + 95790.

Almost surely, 2^75172442 is an apocalyptic number.

75172442 is a deficient number, since it is larger than the sum of its proper divisors (38159194).

75172442 is a wasteful number, since it uses less digits than its factorization.

75172442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190992.

The product of its digits is 15680, while the sum is 32.

The square root of 75172442 is about 8670.2042651831. The cubic root of 75172442 is about 422.0392924039.

Adding to 75172442 its reverse (24427157), we get a palindrome (99599599).

The spelling of 75172442 in words is "seventy-five million, one hundred seventy-two thousand, four hundred forty-two".