1045443621 has 16 divisors (see below), whose sum is σ = 1432569600. Its totient is φ = 677665728.

The previous prime is 1045443617. The next prime is 1045443653. The reversal of 1045443621 is 1263445401.

It is not a de Polignac number, because 1045443621 - 2² = 1045443617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045443661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254260 + ... + 258338.

It is an arithmetic number, because the mean of its divisors is an integer number (89535600).

Almost surely, 2^1045443621 is an apocalyptic number.

It is an amenable number.

1045443621 is a deficient number, since it is larger than the sum of its proper divisors (387125979).

1045443621 is a wasteful number, since it uses less digits than its factorization.

1045443621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6428.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1045443621 is about 32333.3205996538. The cubic root of 1045443621 is about 1014.9240387393.

The spelling of 1045443621 in words is "one billion, forty-five million, four hundred forty-three thousand, six hundred twenty-one".