74563261 has 2 divisors, whose sum is σ = 74563262. Its totient is φ = 74563260.

The previous prime is 74563259. The next prime is 74563283. The reversal of 74563261 is 16236547.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74563225 + 36 = 8635^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 74563261 - 2¹ = 74563259 is a prime.

Together with 74563259, 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 (74563661) 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 as a sum of consecutive naturals, namely, 37281630 + 37281631.

It is an arithmetic number, because the mean of its divisors is an integer number (37281631).

Almost surely, 2^74563261 is an apocalyptic number.

It is an amenable number.

74563261 is a deficient number, since it is larger than the sum of its proper divisors (1).

74563261 is an equidigital number, since it uses as much as digits as its factorization.

74563261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 74563261 is about 8635.0020845394. The cubic root of 74563261 is about 420.8961609386.

The spelling of 74563261 in words is "seventy-four million, five hundred sixty-three thousand, two hundred sixty-one".