1236231641 has 2 divisors, whose sum is σ = 1236231642. Its totient is φ = 1236231640.

The previous prime is 1236231587. The next prime is 1236231643. The reversal of 1236231641 is 1461326321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 684921241 + 551310400 = 26171^2 + 23480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1236231641 - 2²⁶ = 1169122777 is a prime.

It is a Sophie Germain prime.

Together with 1236231643, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1236231643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618115820 + 618115821.

It is an arithmetic number, because the mean of its divisors is an integer number (618115821).

Almost surely, 2^1236231641 is an apocalyptic number.

It is an amenable number.

1236231641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236231641 is an equidigital number, since it uses as much as digits as its factorization.

1236231641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 1236231641 is about 35160.0859071761. The cubic root of 1236231641 is about 1073.2476635090.

Adding to 1236231641 its reverse (1461326321), we get a palindrome (2697557962).

The spelling of 1236231641 in words is "one billion, two hundred thirty-six million, two hundred thirty-one thousand, six hundred forty-one".