1154521323 has 64 divisors (see below), whose sum is σ = 1876129920. Its totient is φ = 698720256.

The previous prime is 1154521321. The next prime is 1154521327. The reversal of 1154521323 is 3231254511.

1154521323 is a `hidden beast` number, since 115 + 4 + 521 + 3 + 23 = 666.

It is not a de Polignac number, because 1154521323 - 2¹ = 1154521321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1154521321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2666115 + ... + 2666547.

It is an arithmetic number, because the mean of its divisors is an integer number (29314530).

Almost surely, 2^1154521323 is an apocalyptic number.

1154521323 is a deficient number, since it is larger than the sum of its proper divisors (721608597).

1154521323 is a wasteful number, since it uses less digits than its factorization.

1154521323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 647 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1154521323 is about 33978.2477917859. The cubic root of 1154521323 is about 1049.0607846207.

Adding to 1154521323 its reverse (3231254511), we get a palindrome (4385775834).

The spelling of 1154521323 in words is "one billion, one hundred fifty-four million, five hundred twenty-one thousand, three hundred twenty-three".