1254423221 has 2 divisors, whose sum is σ = 1254423222. Its totient is φ = 1254423220.

The previous prime is 1254423193. The next prime is 1254423257. The reversal of 1254423221 is 1223244521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109822596 + 144600625 = 33314^2 + 12025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254423221 - 2¹⁴ = 1254406837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1254420221) 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, 627211610 + 627211611.

It is an arithmetic number, because the mean of its divisors is an integer number (627211611).

Almost surely, 2^1254423221 is an apocalyptic number.

It is an amenable number.

1254423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254423221 is an equidigital number, since it uses as much as digits as its factorization.

1254423221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 26.

The square root of 1254423221 is about 35417.8376104471. The cubic root of 1254423221 is about 1078.4864546789.

Adding to 1254423221 its reverse (1223244521), we get a palindrome (2477667742).

The spelling of 1254423221 in words is "one billion, two hundred fifty-four million, four hundred twenty-three thousand, two hundred twenty-one".