74135815 has 16 divisors (see below), whose sum is σ = 100850400. Its totient is φ = 51864192.

The previous prime is 74135813. The next prime is 74135833. The reversal of 74135815 is 51853147.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 74135815 - 2¹ = 74135813 is a prime.

It is a super-2 number, since 2×74135815² = 10992238131428450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74135813) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 28780 + ... + 31249.

It is an arithmetic number, because the mean of its divisors is an integer number (6303150).

Almost surely, 2^74135815 is an apocalyptic number.

74135815 is a deficient number, since it is larger than the sum of its proper divisors (26714585).

74135815 is a wasteful number, since it uses less digits than its factorization.

74135815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60066.

The product of its digits is 16800, while the sum is 34.

The square root of 74135815 is about 8610.2157348118. The cubic root of 74135815 is about 420.0903339331.

The spelling of 74135815 in words is "seventy-four million, one hundred thirty-five thousand, eight hundred fifteen".