74570145 has 32 divisors (see below), whose sum is σ = 128956800. Its totient is φ = 36578304.

The previous prime is 74570137. The next prime is 74570149. The reversal of 74570145 is 54107547.

It is not a de Polignac number, because 74570145 - 2³ = 74570137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74570149) 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 31 ways as a sum of consecutive naturals, for example, 73401 + ... + 74409.

It is an arithmetic number, because the mean of its divisors is an integer number (4029900).

Almost surely, 2^74570145 is an apocalyptic number.

It is an amenable number.

74570145 is a deficient number, since it is larger than the sum of its proper divisors (54386655).

74570145 is a wasteful number, since it uses less digits than its factorization.

74570145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409.

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 74570145 is about 8635.4006855501. The cubic root of 74570145 is about 420.9091135195.

The spelling of 74570145 in words is "seventy-four million, five hundred seventy thousand, one hundred forty-five".