75424145 has 4 divisors (see below), whose sum is σ = 90508980. Its totient is φ = 60339312.

The previous prime is 75424123. The next prime is 75424163. The reversal of 75424145 is 54142457.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14318656 + 61105489 = 3784^2 + 7817^2 .

It is a cyclic number.

It is not a de Polignac number, because 75424145 - 2¹⁰ = 75423121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7542410 + ... + 7542419.

It is an arithmetic number, because the mean of its divisors is an integer number (22627245).

Almost surely, 2^75424145 is an apocalyptic number.

It is an amenable number.

75424145 is a deficient number, since it is larger than the sum of its proper divisors (15084835).

75424145 is a wasteful number, since it uses less digits than its factorization.

75424145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15084834.

The product of its digits is 22400, while the sum is 32.

The square root of 75424145 is about 8684.7075368144. The cubic root of 75424145 is about 422.5098115201.

The spelling of 75424145 in words is "seventy-five million, four hundred twenty-four thousand, one hundred forty-five".