1332311261 has 2 divisors, whose sum is σ = 1332311262. Its totient is φ = 1332311260.

The previous prime is 1332311173. The next prime is 1332311287. The reversal of 1332311261 is 1621132331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1302127225 + 30184036 = 36085^2 + 5494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1332311261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1332311291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666155630 + 666155631.

It is an arithmetic number, because the mean of its divisors is an integer number (666155631).

Almost surely, 2^1332311261 is an apocalyptic number.

It is an amenable number.

1332311261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1332311261 is an equidigital number, since it uses as much as digits as its factorization.

1332311261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 1332311261 is about 36500.8391821339. The cubic root of 1332311261 is about 1100.3611103666.

Adding to 1332311261 its reverse (1621132331), we get a palindrome (2953443592).

The spelling of 1332311261 in words is "one billion, three hundred thirty-two million, three hundred eleven thousand, two hundred sixty-one".