75411421 has 4 divisors (see below), whose sum is σ = 76834332. Its totient is φ = 73988512.

The previous prime is 75411407. The next prime is 75411449. The reversal of 75411421 is 12411457.

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 22325625 + 53085796 = 4725^2 + 7286^2 .

It is a cyclic number.

It is not a de Polignac number, because 75411421 - 2¹⁹ = 74887133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75411451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711376 + ... + 711481.

It is an arithmetic number, because the mean of its divisors is an integer number (19208583).

Almost surely, 2^75411421 is an apocalyptic number.

It is an amenable number.

75411421 is a deficient number, since it is larger than the sum of its proper divisors (1422911).

75411421 is a wasteful number, since it uses less digits than its factorization.

75411421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422910.

The product of its digits is 1120, while the sum is 25.

The square root of 75411421 is about 8683.9749539022. The cubic root of 75411421 is about 422.4860511483.

Adding to 75411421 its reverse (12411457), we get a palindrome (87822878).

The spelling of 75411421 in words is "seventy-five million, four hundred eleven thousand, four hundred twenty-one".