1231249301 has 2 divisors, whose sum is σ = 1231249302. Its totient is φ = 1231249300.

The previous prime is 1231249297. The next prime is 1231249303. The reversal of 1231249301 is 1039421321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1171419076 + 59830225 = 34226^2 + 7735^2 .

It is an emirp because it is prime and its reverse (1039421321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231249301 - 2² = 1231249297 is a prime.

Together with 1231249303, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231249303) 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 as a sum of consecutive naturals, namely, 615624650 + 615624651.

It is an arithmetic number, because the mean of its divisors is an integer number (615624651).

Almost surely, 2^1231249301 is an apocalyptic number.

It is an amenable number.

1231249301 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231249301 is an equidigital number, since it uses as much as digits as its factorization.

1231249301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1231249301 is about 35089.1621587065. The cubic root of 1231249301 is about 1071.8038983411.

The spelling of 1231249301 in words is "one billion, two hundred thirty-one million, two hundred forty-nine thousand, three hundred one".