1228151241 has 60 divisors (see below), whose sum is σ = 1960767732. Its totient is φ = 765904896.

The previous prime is 1228151227. The next prime is 1228151293. The reversal of 1228151241 is 1421518221.

It can be written as a sum of positive squares in 2 ways, for example, as 322382025 + 905769216 = 17955^2 + 30096^2 .

It is not a de Polignac number, because 1228151241 - 2⁵ = 1228151209 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228151641) 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 59 ways as a sum of consecutive naturals, for example, 2836161 + ... + 2836593.

Almost surely, 2^1228151241 is an apocalyptic number.

It is an amenable number.

1228151241 is a deficient number, since it is larger than the sum of its proper divisors (732616491).

1228151241 is an equidigital number, since it uses as much as digits as its factorization.

1228151241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 552 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 1228151241 is about 35044.9888143797. The cubic root of 1228151241 is about 1070.9041884019.

Adding to 1228151241 its reverse (1421518221), we get a palindrome (2649669462).

The spelling of 1228151241 in words is "one billion, two hundred twenty-eight million, one hundred fifty-one thousand, two hundred forty-one".