75421251 has 6 divisors (see below), whose sum is σ = 108941820. Its totient is φ = 50280828.

The previous prime is 75421249. The next prime is 75421259. The reversal of 75421251 is 15212457.

It is not a de Polignac number, because 75421251 - 2¹ = 75421249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75421259) 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, 4190061 + ... + 4190078.

It is an arithmetic number, because the mean of its divisors is an integer number (18156970).

Almost surely, 2^75421251 is an apocalyptic number.

75421251 is a deficient number, since it is larger than the sum of its proper divisors (33520569).

75421251 is a wasteful number, since it uses less digits than its factorization.

75421251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8380145 (or 8380142 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 75421251 is about 8684.5409205093. The cubic root of 75421251 is about 422.5044075961.

The spelling of 75421251 in words is "seventy-five million, four hundred twenty-one thousand, two hundred fifty-one".