1040454221 has 2 divisors, whose sum is σ = 1040454222. Its totient is φ = 1040454220.

The previous prime is 1040454211. The next prime is 1040454223. The reversal of 1040454221 is 1224540401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1035938596 + 4515625 = 32186^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040454221 - 2⁶ = 1040454157 is a prime.

Together with 1040454223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040454223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520227110 + 520227111.

It is an arithmetic number, because the mean of its divisors is an integer number (520227111).

Almost surely, 2^1040454221 is an apocalyptic number.

It is an amenable number.

1040454221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040454221 is an equidigital number, since it uses as much as digits as its factorization.

1040454221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1040454221 is about 32256.0726220661. The cubic root of 1040454221 is about 1013.3068817998.

Adding to 1040454221 its reverse (1224540401), we get a palindrome (2264994622).

The spelling of 1040454221 in words is "one billion, forty million, four hundred fifty-four thousand, two hundred twenty-one".