75144742 has 16 divisors (see below), whose sum is σ = 116859600. Its totient is φ = 36197280.

The previous prime is 75144733. The next prime is 75144781. The reversal of 75144742 is 24744157.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 75144698 and 75144707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31984 + ... + 34252.

It is an arithmetic number, because the mean of its divisors is an integer number (7303725).

Almost surely, 2^75144742 is an apocalyptic number.

75144742 is a deficient number, since it is larger than the sum of its proper divisors (41714858).

75144742 is a wasteful number, since it uses less digits than its factorization.

75144742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871.

The product of its digits is 31360, while the sum is 34.

The square root of 75144742 is about 8668.6066931197. The cubic root of 75144742 is about 421.9874474977.

Adding to 75144742 its reverse (24744157), we get a palindrome (99888899).

The spelling of 75144742 in words is "seventy-five million, one hundred forty-four thousand, seven hundred forty-two".