1145445647 has 8 divisors (see below), whose sum is σ = 1226169600. Its totient is φ = 1066765464.

The previous prime is 1145445641. The next prime is 1145445661. The reversal of 1145445647 is 7465445411.

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 1145445647 - 2⁸ = 1145445391 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 (1145445641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509783 + ... + 512024.

It is an arithmetic number, because the mean of its divisors is an integer number (153271200).

Almost surely, 2^1145445647 is an apocalyptic number.

1145445647 is a deficient number, since it is larger than the sum of its proper divisors (80723953).

1145445647 is a wasteful number, since it uses less digits than its factorization.

1145445647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021885.

The product of its digits is 268800, while the sum is 41.

The square root of 1145445647 is about 33844.4330281953. The cubic root of 1145445647 is about 1046.3046659581.

The spelling of 1145445647 in words is "one billion, one hundred forty-five million, four hundred forty-five thousand, six hundred forty-seven".