1045810921 has 9 divisors (see below), whose sum is σ = 1062732279. Its totient is φ = 1029156336.

The previous prime is 1045810919. The next prime is 1045810933. The reversal of 1045810921 is 1290185401.

It is a happy number.

The square root of 1045810921 is 32339.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 593653225 + 452157696 = 24365^2 + 21264^2 .

It is not a de Polignac number, because 1045810921 - 2¹ = 1045810919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045810121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2360526 + ... + 2360968.

Almost surely, 2^1045810921 is an apocalyptic number.

1045810921 is the 32339-th square number.

1045810921 is the 16170-th centered octagonal number.

It is an amenable number.

1045810921 is a deficient number, since it is larger than the sum of its proper divisors (16921358).

1045810921 is an frugal number, since it uses more digits than its factorization.

1045810921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 31.

The cubic root of 1045810921 is about 1015.0428839655.

The spelling of 1045810921 in words is "one billion, forty-five million, eight hundred ten thousand, nine hundred twenty-one".