1232137261 has 2 divisors, whose sum is σ = 1232137262. Its totient is φ = 1232137260.

The previous prime is 1232137223. The next prime is 1232137321. The reversal of 1232137261 is 1627312321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641355625 + 590781636 = 25325^2 + 24306^2 .

It is an emirp because it is prime and its reverse (1627312321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1232137261 - 2²¹ = 1230040109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232137201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616068630 + 616068631.

It is an arithmetic number, because the mean of its divisors is an integer number (616068631).

Almost surely, 2^1232137261 is an apocalyptic number.

It is an amenable number.

1232137261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232137261 is an equidigital number, since it uses as much as digits as its factorization.

1232137261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 1232137261 is about 35101.8127879459. The cubic root of 1232137261 is about 1072.0614931519.

Adding to 1232137261 its reverse (1627312321), we get a palindrome (2859449582).

The spelling of 1232137261 in words is "one billion, two hundred thirty-two million, one hundred thirty-seven thousand, two hundred sixty-one".