1300001251 has 2 divisors, whose sum is σ = 1300001252. Its totient is φ = 1300001250.

The previous prime is 1300001249. The next prime is 1300001293. The reversal of 1300001251 is 1521000031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1300001251 - 2¹ = 1300001249 is a prime.

Together with 1300001249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1300001231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650000625 + 650000626.

It is an arithmetic number, because the mean of its divisors is an integer number (650000626).

Almost surely, 2^1300001251 is an apocalyptic number.

1300001251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1300001251 is an equidigital number, since it uses as much as digits as its factorization.

1300001251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1300001251 is about 36055.5301028844. The cubic root of 1300001251 is about 1091.3932331462.

Adding to 1300001251 its reverse (1521000031), we get a palindrome (2821001282).

The spelling of 1300001251 in words is "one billion, three hundred million, one thousand, two hundred fifty-one".