74121842 has 4 divisors (see below), whose sum is σ = 111182766. Its totient is φ = 37060920.

The previous prime is 74121833. The next prime is 74121863. The reversal of 74121842 is 24812147.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24812147 = 23 ⋅1078789.

It can be written as a sum of positive squares in only one way, i.e., 57320041 + 16801801 = 7571^2 + 4099^2 .

It is a super-2 number, since 2×74121842² = 10988094922945928, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18530459 + ... + 18530462.

Almost surely, 2^74121842 is an apocalyptic number.

74121842 is a deficient number, since it is larger than the sum of its proper divisors (37060924).

74121842 is a wasteful number, since it uses less digits than its factorization.

74121842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37060923.

The product of its digits is 3584, while the sum is 29.

The square root of 74121842 is about 8609.4042767197. The cubic root of 74121842 is about 420.0639396230.

Adding to 74121842 its reverse (24812147), we get a palindrome (98933989).

The spelling of 74121842 in words is "seventy-four million, one hundred twenty-one thousand, eight hundred forty-two".