1145621223 has 12 divisors (see below), whose sum is σ = 1655431440. Its totient is φ = 763449696.

The previous prime is 1145621209. The next prime is 1145621227. The reversal of 1145621223 is 3221265411.

1145621223 is a `hidden beast` number, since 1 + 14 + 5 + 621 + 2 + 23 = 666.

It is not a de Polignac number, because 1145621223 - 2⁶ = 1145621159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145621227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 958 + ... + 47876.

It is an arithmetic number, because the mean of its divisors is an integer number (137952620).

Almost surely, 2^1145621223 is an apocalyptic number.

1145621223 is a deficient number, since it is larger than the sum of its proper divisors (509810217).

1145621223 is a wasteful number, since it uses less digits than its factorization.

1145621223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49638 (or 49635 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1145621223 is about 33847.0267970467. The cubic root of 1145621223 is about 1046.3581230567.

Adding to 1145621223 its reverse (3221265411), we get a palindrome (4366886634).

The spelling of 1145621223 in words is "one billion, one hundred forty-five million, six hundred twenty-one thousand, two hundred twenty-three".