1154171121 has 4 divisors (see below), whose sum is σ = 1538894832. Its totient is φ = 769447412.

The previous prime is 1154171077. The next prime is 1154171129. The reversal of 1154171121 is 1211714511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1154171121 - 2⁷ = 1154170993 is a prime.

It is a super-2 number, since 2×1154171121² = 2664221953100793282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1154171091 and 1154171100.

It is not an unprimeable number, because it can be changed into a prime (1154171129) 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 3 ways as a sum of consecutive naturals, for example, 192361851 + ... + 192361856.

It is an arithmetic number, because the mean of its divisors is an integer number (384723708).

Almost surely, 2^1154171121 is an apocalyptic number.

It is an amenable number.

1154171121 is a deficient number, since it is larger than the sum of its proper divisors (384723711).

1154171121 is an equidigital number, since it uses as much as digits as its factorization.

1154171121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384723710.

The product of its digits is 280, while the sum is 24.

The square root of 1154171121 is about 33973.0940745761. The cubic root of 1154171121 is about 1048.9547030410.

Adding to 1154171121 its reverse (1211714511), we get a palindrome (2365885632).

The spelling of 1154171121 in words is "one billion, one hundred fifty-four million, one hundred seventy-one thousand, one hundred twenty-one".