1145545213 has 4 divisors (see below), whose sum is σ = 1145685600. Its totient is φ = 1145404828.

The previous prime is 1145545189. The next prime is 1145545217. The reversal of 1145545213 is 3125455411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145545213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145545217) 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, 57145 + ... + 74542.

It is an arithmetic number, because the mean of its divisors is an integer number (286421400).

Almost surely, 2^1145545213 is an apocalyptic number.

It is an amenable number.

1145545213 is a deficient number, since it is larger than the sum of its proper divisors (140387).

1145545213 is an equidigital number, since it uses as much as digits as its factorization.

1145545213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140386.

The product of its digits is 12000, while the sum is 31.

The square root of 1145545213 is about 33845.9039323815. The cubic root of 1145545213 is about 1046.3349811903.

The spelling of 1145545213 in words is "one billion, one hundred forty-five million, five hundred forty-five thousand, two hundred thirteen".