1045243313 has 4 divisors (see below), whose sum is σ = 1046106228. Its totient is φ = 1044380400.

The previous prime is 1045243307. The next prime is 1045243343. The reversal of 1045243313 is 3133425401.

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 555639184 + 489604129 = 23572^2 + 22127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1045243313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045243343) 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, 429638 + ... + 432063.

It is an arithmetic number, because the mean of its divisors is an integer number (261526557).

Almost surely, 2^1045243313 is an apocalyptic number.

It is an amenable number.

1045243313 is a deficient number, since it is larger than the sum of its proper divisors (862915).

1045243313 is an equidigital number, since it uses as much as digits as its factorization.

1045243313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862914.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1045243313 is about 32330.2229036547. Note that the first 3 decimals coincide. The cubic root of 1045243313 is about 1014.8592144594.

Adding to 1045243313 its reverse (3133425401), we get a palindrome (4178668714).

The spelling of 1045243313 in words is "one billion, forty-five million, two hundred forty-three thousand, three hundred thirteen".