75891421 has 8 divisors (see below), whose sum is σ = 79280640. Its totient is φ = 72509712.

The previous prime is 75891419. The next prime is 75891437. The reversal of 75891421 is 12419857.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75891421 - 2¹ = 75891419 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 (75891461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31951 + ... + 34243.

It is an arithmetic number, because the mean of its divisors is an integer number (9910080).

Almost surely, 2^75891421 is an apocalyptic number.

It is an amenable number.

75891421 is a deficient number, since it is larger than the sum of its proper divisors (3389219).

75891421 is a wasteful number, since it uses less digits than its factorization.

75891421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755.

The product of its digits is 20160, while the sum is 37.

The square root of 75891421 is about 8711.5682285109. The cubic root of 75891421 is about 423.3805423341.

The spelling of 75891421 in words is "seventy-five million, eight hundred ninety-one thousand, four hundred twenty-one".