75042217 has 4 divisors (see below), whose sum is σ = 75116880. Its totient is φ = 74967556.

The previous prime is 75042197. The next prime is 75042239. The reversal of 75042217 is 71224057.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71224057 = 367 ⋅194071.

It is a cyclic number.

It is not a de Polignac number, because 75042217 - 2⁷ = 75042089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75042287) 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 3 ways as a sum of consecutive naturals, for example, 35803 + ... + 37840.

It is an arithmetic number, because the mean of its divisors is an integer number (18779220).

Almost surely, 2^75042217 is an apocalyptic number.

It is an amenable number.

75042217 is a deficient number, since it is larger than the sum of its proper divisors (74663).

75042217 is a wasteful number, since it uses less digits than its factorization.

75042217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74662.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 75042217 is about 8662.6910945733. The cubic root of 75042217 is about 421.7954449129.

The spelling of 75042217 in words is "seventy-five million, forty-two thousand, two hundred seventeen".