1044249421 has 2 divisors, whose sum is σ = 1044249422. Its totient is φ = 1044249420.

The previous prime is 1044249419. The next prime is 1044249433. The reversal of 1044249421 is 1249424401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840188196 + 204061225 = 28986^2 + 14285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044249421 - 2¹ = 1044249419 is a prime.

Together with 1044249419, 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 (1044249461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522124710 + 522124711.

It is an arithmetic number, because the mean of its divisors is an integer number (522124711).

Almost surely, 2^1044249421 is an apocalyptic number.

It is an amenable number.

1044249421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044249421 is an equidigital number, since it uses as much as digits as its factorization.

1044249421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 1044249421 is about 32314.8483053843. The cubic root of 1044249421 is about 1014.5374455746.

The spelling of 1044249421 in words is "one billion, forty-four million, two hundred forty-nine thousand, four hundred twenty-one".