1045451321 has 4 divisors (see below), whose sum is σ = 1045542372. Its totient is φ = 1045360272.

The previous prime is 1045451299. The next prime is 1045451327. The reversal of 1045451321 is 1231545401.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 916878400 + 128572921 = 30280^2 + 11339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1045451321 - 2⁶ = 1045451257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045451327) 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, 25310 + ... + 52263.

It is an arithmetic number, because the mean of its divisors is an integer number (261385593).

Almost surely, 2^1045451321 is an apocalyptic number.

It is an amenable number.

1045451321 is a deficient number, since it is larger than the sum of its proper divisors (91051).

1045451321 is an equidigital number, since it uses as much as digits as its factorization.

1045451321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91050.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1045451321 is about 32333.4396716464. The cubic root of 1045451321 is about 1014.9265304712.

Adding to 1045451321 its reverse (1231545401), we get a palindrome (2276996722).

The spelling of 1045451321 in words is "one billion, forty-five million, four hundred fifty-one thousand, three hundred twenty-one".