1045621044 has 36 divisors (see below), whose sum is σ = 2846414116. Its totient is φ = 321729408.

The previous prime is 1045621043. The next prime is 1045621061. The reversal of 1045621044 is 4401265401.

It can be written as a sum of positive squares in 2 ways, for example, as 676520100 + 369100944 = 26010^2 + 19212^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 1045620999 and 1045621017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045621043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1116649 + ... + 1117584.

Almost surely, 2^1045621044 is an apocalyptic number.

It is an amenable number.

1045621044 is an abundant number, since it is smaller than the sum of its proper divisors (1800793072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1045621044 is a wasteful number, since it uses less digits than its factorization.

1045621044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234256 (or 2234251 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1045621044 is about 32336.0641389765. The cubic root of 1045621044 is about 1014.9814499914.

Adding to 1045621044 its reverse (4401265401), we get a palindrome (5446886445).

The spelling of 1045621044 in words is "one billion, forty-five million, six hundred twenty-one thousand, forty-four".