75442442 has 4 divisors (see below), whose sum is σ = 113163666. Its totient is φ = 37721220.

The previous prime is 75442403. The next prime is 75442459. The reversal of 75442442 is 24424457.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67551961 + 7890481 = 8219^2 + 2809^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75442399 and 75442408.

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 as a sum of consecutive naturals, namely, 18860609 + ... + 18860612.

Almost surely, 2^75442442 is an apocalyptic number.

75442442 is a deficient number, since it is larger than the sum of its proper divisors (37721224).

75442442 is a wasteful number, since it uses less digits than its factorization.

75442442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37721223.

The product of its digits is 35840, while the sum is 32.

The square root of 75442442 is about 8685.7608762848. The cubic root of 75442442 is about 422.5439740419.

Adding to 75442442 its reverse (24424457), we get a palindrome (99866899).

The spelling of 75442442 in words is "seventy-five million, four hundred forty-two thousand, four hundred forty-two".