74025221 has 2 divisors, whose sum is σ = 74025222. Its totient is φ = 74025220.

The previous prime is 74025209. The next prime is 74025227. The reversal of 74025221 is 12252047.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65788321 + 8236900 = 8111^2 + 2870^2 .

It is a cyclic number.

It is not a de Polignac number, because 74025221 - 2¹⁸ = 73763077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74025227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37012610 + 37012611.

It is an arithmetic number, because the mean of its divisors is an integer number (37012611).

Almost surely, 2^74025221 is an apocalyptic number.

It is an amenable number.

74025221 is a deficient number, since it is larger than the sum of its proper divisors (1).

74025221 is an equidigital number, since it uses as much as digits as its factorization.

74025221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 74025221 is about 8603.7910830052. The cubic root of 74025221 is about 419.8813364693.

Adding to 74025221 its reverse (12252047), we get a palindrome (86277268).

The spelling of 74025221 in words is "seventy-four million, twenty-five thousand, two hundred twenty-one".