1154344221 has 12 divisors (see below), whose sum is σ = 1755143520. Its totient is φ = 729059400.

The previous prime is 1154344201. The next prime is 1154344229. The reversal of 1154344221 is 1224434511.

1154344221 is a `hidden beast` number, since 1 + 1 + 5 + 434 + 4 + 221 = 666.

It is not a de Polignac number, because 1154344221 - 2⁵ = 1154344189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154344229) 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, 3375105 + ... + 3375446.

It is an arithmetic number, because the mean of its divisors is an integer number (146261960).

Almost surely, 2^1154344221 is an apocalyptic number.

It is an amenable number.

1154344221 is a deficient number, since it is larger than the sum of its proper divisors (600799299).

1154344221 is a wasteful number, since it uses less digits than its factorization.

1154344221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6750576 (or 6750573 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1154344221 is about 33975.6415833461. The cubic root of 1154344221 is about 1049.0071403787.

Adding to 1154344221 its reverse (1224434511), we get a palindrome (2378778732).

The spelling of 1154344221 in words is "one billion, one hundred fifty-four million, three hundred forty-four thousand, two hundred twenty-one".