75194421 has 4 divisors (see below), whose sum is σ = 100259232. Its totient is φ = 50129612.

The previous prime is 75194411. The next prime is 75194423. The reversal of 75194421 is 12449157.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 75194421 - 2⁷ = 75194293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75194423) 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, 12532401 + ... + 12532406.

It is an arithmetic number, because the mean of its divisors is an integer number (25064808).

Almost surely, 2^75194421 is an apocalyptic number.

It is an amenable number.

75194421 is a deficient number, since it is larger than the sum of its proper divisors (25064811).

75194421 is a wasteful number, since it uses less digits than its factorization.

75194421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25064810.

The product of its digits is 10080, while the sum is 33.

The square root of 75194421 is about 8671.4716744045. The cubic root of 75194421 is about 422.0804204976.

The spelling of 75194421 in words is "seventy-five million, one hundred ninety-four thousand, four hundred twenty-one".