74221501 has 2 divisors, whose sum is σ = 74221502. Its totient is φ = 74221500.

The previous prime is 74221489. The next prime is 74221517. The reversal of 74221501 is 10512247.

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., 74132100 + 89401 = 8610^2 + 299^2 .

It is an emirp because it is prime and its reverse (10512247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74221501 - 2⁹ = 74220989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74221591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37110750 + 37110751.

It is an arithmetic number, because the mean of its divisors is an integer number (37110751).

Almost surely, 2^74221501 is an apocalyptic number.

It is an amenable number.

74221501 is a deficient number, since it is larger than the sum of its proper divisors (1).

74221501 is an equidigital number, since it uses as much as digits as its factorization.

74221501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 74221501 is about 8615.1901313900. The cubic root of 74221501 is about 420.2521180913.

Adding to 74221501 its reverse (10512247), we get a palindrome (84733748).

The spelling of 74221501 in words is "seventy-four million, two hundred twenty-one thousand, five hundred one".