1244066621 has 16 divisors (see below), whose sum is σ = 1472739840. Its totient is φ = 1028227200.

The previous prime is 1244066599. The next prime is 1244066633. The reversal of 1244066621 is 1266604421.

It is a de Polignac number, because none of the positive numbers 2^k-1244066621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244066671) 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 in 15 ways as a sum of consecutive naturals, for example, 170396 + ... + 177546.

It is an arithmetic number, because the mean of its divisors is an integer number (92046240).

Almost surely, 2^1244066621 is an apocalyptic number.

It is an amenable number.

1244066621 is a deficient number, since it is larger than the sum of its proper divisors (228673219).

1244066621 is an equidigital number, since it uses as much as digits as its factorization.

1244066621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1244066621 is about 35271.3285970347. The cubic root of 1244066621 is about 1075.5102307656.

The spelling of 1244066621 in words is "one billion, two hundred forty-four million, sixty-six thousand, six hundred twenty-one".