1044401921 has 4 divisors (see below), whose sum is σ = 1053983700. Its totient is φ = 1034820144.

The previous prime is 1044401887. The next prime is 1044401927. The reversal of 1044401921 is 1291044401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 406586896 + 637815025 = 20164^2 + 25255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044401921 - 2⁶ = 1044401857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1044401927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4790726 + ... + 4790943.

It is an arithmetic number, because the mean of its divisors is an integer number (263495925).

Almost surely, 2^1044401921 is an apocalyptic number.

It is an amenable number.

1044401921 is a deficient number, since it is larger than the sum of its proper divisors (9581779).

1044401921 is an equidigital number, since it uses as much as digits as its factorization.

1044401921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9581778.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1044401921 is about 32317.2078156514. The cubic root of 1044401921 is about 1014.5868301457.

The spelling of 1044401921 in words is "one billion, forty-four million, four hundred one thousand, nine hundred twenty-one".