1241261231 has 4 divisors (see below), whose sum is σ = 1418584272. Its totient is φ = 1063938192.

The previous prime is 1241261209. The next prime is 1241261233. The reversal of 1241261231 is 1321621421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1241261231 - 2⁶ = 1241261167 is a prime.

It is a super-2 number, since 2×1241261231² = 3081458887167270722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1241261197 and 1241261206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241261233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88661510 + ... + 88661523.

It is an arithmetic number, because the mean of its divisors is an integer number (354646068).

Almost surely, 2^1241261231 is an apocalyptic number.

1241261231 is a deficient number, since it is larger than the sum of its proper divisors (177323041).

1241261231 is an equidigital number, since it uses as much as digits as its factorization.

1241261231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177323040.

The product of its digits is 576, while the sum is 23.

The square root of 1241261231 is about 35231.5374487121. The cubic root of 1241261231 is about 1074.7011914412.

Adding to 1241261231 its reverse (1321621421), we get a palindrome (2562882652).

The spelling of 1241261231 in words is "one billion, two hundred forty-one million, two hundred sixty-one thousand, two hundred thirty-one".