1145623361 has 8 divisors (see below), whose sum is σ = 1149052200. Its totient is φ = 1142201088.

The previous prime is 1145623351. The next prime is 1145623363. The reversal of 1145623361 is 1633265411.

It can be written as a sum of positive squares in 4 ways, for example, as 402243136 + 743380225 = 20056^2 + 27265^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1145623361 - 2²² = 1141429057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145623363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738815 + ... + 740363.

It is an arithmetic number, because the mean of its divisors is an integer number (143631525).

Almost surely, 2^1145623361 is an apocalyptic number.

It is an amenable number.

1145623361 is a deficient number, since it is larger than the sum of its proper divisors (3428839).

1145623361 is an equidigital number, since it uses as much as digits as its factorization.

1145623361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283.

The product of its digits is 12960, while the sum is 32.

The square root of 1145623361 is about 33847.0583803083. The cubic root of 1145623361 is about 1046.3587739735.

Adding to 1145623361 its reverse (1633265411), we get a palindrome (2778888772).

The spelling of 1145623361 in words is "one billion, one hundred forty-five million, six hundred twenty-three thousand, three hundred sixty-one".