74421253 has 2 divisors, whose sum is σ = 74421254. Its totient is φ = 74421252.

The previous prime is 74421251. The next prime is 74421299. The reversal of 74421253 is 35212447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74338884 + 82369 = 8622^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 74421253 - 2¹ = 74421251 is a prime.

Together with 74421251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74421251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37210626 + 37210627.

It is an arithmetic number, because the mean of its divisors is an integer number (37210627).

Almost surely, 2^74421253 is an apocalyptic number.

It is an amenable number.

74421253 is a deficient number, since it is larger than the sum of its proper divisors (1).

74421253 is an equidigital number, since it uses as much as digits as its factorization.

74421253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 74421253 is about 8626.7753535142. The cubic root of 74421253 is about 420.6287879437.

The spelling of 74421253 in words is "seventy-four million, four hundred twenty-one thousand, two hundred fifty-three".