75495421 has 2 divisors, whose sum is σ = 75495422. Its totient is φ = 75495420.

The previous prime is 75495403. The next prime is 75495437. The reversal of 75495421 is 12459457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45091225 + 30404196 = 6715^2 + 5514^2 .

It is an emirp because it is prime and its reverse (12459457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75495421 - 2⁷ = 75495293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75495461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37747710 + 37747711.

It is an arithmetic number, because the mean of its divisors is an integer number (37747711).

Almost surely, 2^75495421 is an apocalyptic number.

It is an amenable number.

75495421 is a deficient number, since it is larger than the sum of its proper divisors (1).

75495421 is an equidigital number, since it uses as much as digits as its factorization.

75495421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 75495421 is about 8688.8101026550. The cubic root of 75495421 is about 422.6428605506.

The spelling of 75495421 in words is "seventy-five million, four hundred ninety-five thousand, four hundred twenty-one".