74400142 has 4 divisors (see below), whose sum is σ = 111600216. Its totient is φ = 37200070.

The previous prime is 74400133. The next prime is 74400163. The reversal of 74400142 is 24100447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24100447 = 7 ⋅3442921.

It is a super-2 number, since 2×74400142² = 11070762259240328, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 18600034 + ... + 18600037.

It is an arithmetic number, because the mean of its divisors is an integer number (27900054).

Almost surely, 2^74400142 is an apocalyptic number.

74400142 is a deficient number, since it is larger than the sum of its proper divisors (37200074).

74400142 is a wasteful number, since it uses less digits than its factorization.

74400142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37200073.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 74400142 is about 8625.5516925006. The cubic root of 74400142 is about 420.5890110710.

Adding to 74400142 its reverse (24100447), we get a palindrome (98500589).

The spelling of 74400142 in words is "seventy-four million, four hundred thousand, one hundred forty-two".