74105145 has 16 divisors (see below), whose sum is σ = 131742720. Its totient is φ = 39522672.

The previous prime is 74105137. The next prime is 74105153. The reversal of 74105145 is 54150147.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (74105137) and next prime (74105153).

It is not a de Polignac number, because 74105145 - 2³ = 74105137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274329 + ... + 274598.

It is an arithmetic number, because the mean of its divisors is an integer number (8233920).

Almost surely, 2^74105145 is an apocalyptic number.

It is an amenable number.

74105145 is a deficient number, since it is larger than the sum of its proper divisors (57637575).

74105145 is a wasteful number, since it uses less digits than its factorization.

74105145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548941 (or 548935 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 74105145 is about 8608.4345266721. The cubic root of 74105145 is about 420.0323954604.

The spelling of 74105145 in words is "seventy-four million, one hundred five thousand, one hundred forty-five".