75421117 has 6 divisors (see below), whose sum is σ = 78843422. Its totient is φ = 72141432.

The previous prime is 75421081. The next prime is 75421139. The reversal of 75421117 is 71112457.

It can be written as a sum of positive squares in only one way, i.e., 58660281 + 16760836 = 7659^2 + 4094^2 .

It is not a de Polignac number, because 75421117 - 2¹⁵ = 75388349 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 (75421147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70758 + ... + 71815.

Almost surely, 2^75421117 is an apocalyptic number.

It is an amenable number.

75421117 is a deficient number, since it is larger than the sum of its proper divisors (3422305).

75421117 is a wasteful number, since it uses less digits than its factorization.

75421117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142619 (or 142596 counting only the distinct ones).

The product of its digits is 1960, while the sum is 28.

The square root of 75421117 is about 8684.5332056478. The cubic root of 75421117 is about 422.5041573765.

The spelling of 75421117 in words is "seventy-five million, four hundred twenty-one thousand, one hundred seventeen".