75442 has 8 divisors (see below), whose sum is σ = 115056. Its totient is φ = 37092.

The previous prime is 75437. The next prime is 75479. The reversal of 75442 is 24457.

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

It is a super-3 number, since 3×75442³ = 1288133379752664, which contains 333 as substring.

It is a plaindrome in base 12.

It is a nialpdrome in base 10.

It is an unprimeable number.

75442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148 + ... + 415.

It is an arithmetic number, because the mean of its divisors is an integer number (14382).

2⁷⁵⁴⁴² is an apocalyptic number.

75442 is a deficient number, since it is larger than the sum of its proper divisors (39614).

75442 is a wasteful number, since it uses less digits than its factorization.

75442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632.

The product of its digits is 1120, while the sum is 22.

The square root of 75442 is about 274.6670711971. The cubic root of 75442 is about 42.2543148844.

Adding to 75442 its reverse (24457), we get a palindrome (99899).

The spelling of 75442 in words is "seventy-five thousand, four hundred forty-two".