1147251121 has 4 divisors (see below), whose sum is σ = 1147874112. Its totient is φ = 1146628132.

The previous prime is 1147251097. The next prime is 1147251181. The reversal of 1147251121 is 1211527411.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1211527411 = 10337 ⋅117203.

It is a cyclic number.

It is not a de Polignac number, because 1147251121 - 2¹⁷ = 1147120049 is a prime.

It is a super-3 number, since 3×1147251121³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1147251181) 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, 308725 + ... + 312418.

It is an arithmetic number, because the mean of its divisors is an integer number (286968528).

Almost surely, 2^1147251121 is an apocalyptic number.

It is an amenable number.

1147251121 is a deficient number, since it is larger than the sum of its proper divisors (622991).

1147251121 is an equidigital number, since it uses as much as digits as its factorization.

1147251121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622990.

The product of its digits is 560, while the sum is 25.

The square root of 1147251121 is about 33871.0956569167. The cubic root of 1147251121 is about 1046.8541127203.

Adding to 1147251121 its reverse (1211527411), we get a palindrome (2358778532).

The spelling of 1147251121 in words is "one billion, one hundred forty-seven million, two hundred fifty-one thousand, one hundred twenty-one".