74816145 has 12 divisors (see below), whose sum is σ = 129681396. Its totient is φ = 39901920.

The previous prime is 74816107. The next prime is 74816149. The reversal of 74816145 is 54161847.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40908816 + 33907329 = 6396^2 + 5823^2 .

It is not a de Polignac number, because 74816145 - 2⁷ = 74816017 is a prime.

It is a super-2 number, since 2×74816145² = 11194911105322050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74816149) 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 11 ways as a sum of consecutive naturals, for example, 831246 + ... + 831335.

It is an arithmetic number, because the mean of its divisors is an integer number (10806783).

Almost surely, 2^74816145 is an apocalyptic number.

It is an amenable number.

74816145 is a deficient number, since it is larger than the sum of its proper divisors (54865251).

74816145 is a wasteful number, since it uses less digits than its factorization.

74816145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662592 (or 1662589 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 74816145 is about 8649.6326511592. The cubic root of 74816145 is about 421.3714522112.

The spelling of 74816145 in words is "seventy-four million, eight hundred sixteen thousand, one hundred forty-five".