75491421 has 8 divisors (see below), whose sum is σ = 100698624. Its totient is φ = 50305920.

The previous prime is 75491419. The next prime is 75491431. The reversal of 75491421 is 12419457.

It is a happy number.

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

It is not a de Polignac number, because 75491421 - 2¹ = 75491419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75491411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6340 + ... + 13826.

It is an arithmetic number, because the mean of its divisors is an integer number (12587328).

Almost surely, 2^75491421 is an apocalyptic number.

It is an amenable number.

75491421 is a deficient number, since it is larger than the sum of its proper divisors (25207203).

75491421 is a wasteful number, since it uses less digits than its factorization.

75491421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10851.

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

The square root of 75491421 is about 8688.5799184907. The cubic root of 75491421 is about 422.6353960745.

The spelling of 75491421 in words is "seventy-five million, four hundred ninety-one thousand, four hundred twenty-one".