1145562221 has 8 divisors (see below), whose sum is σ = 1213921080. Its totient is φ = 1077311488.

The previous prime is 1145562191. The next prime is 1145562233. The reversal of 1145562221 is 1222655411.

It can be written as a sum of positive squares in 4 ways, for example, as 261986596 + 883575625 = 16186^2 + 29725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1145562221 - 2⁶ = 1145562157 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 (1145562721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4676 + ... + 48093.

It is an arithmetic number, because the mean of its divisors is an integer number (151740135).

Almost surely, 2^1145562221 is an apocalyptic number.

It is an amenable number.

1145562221 is a deficient number, since it is larger than the sum of its proper divisors (68358859).

1145562221 is a wasteful number, since it uses less digits than its factorization.

1145562221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54063.

The product of its digits is 4800, while the sum is 29.

The square root of 1145562221 is about 33846.1551878496. The cubic root of 1145562221 is about 1046.3401595039.

The spelling of 1145562221 in words is "one billion, one hundred forty-five million, five hundred sixty-two thousand, two hundred twenty-one".