1251264017 has 2 divisors, whose sum is σ = 1251264018. Its totient is φ = 1251264016.

The previous prime is 1251263989. The next prime is 1251264031. The reversal of 1251264017 is 7104621521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1086295681 + 164968336 = 32959^2 + 12844^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251264017 - 2¹² = 1251259921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251264097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625632008 + 625632009.

It is an arithmetic number, because the mean of its divisors is an integer number (625632009).

Almost surely, 2^1251264017 is an apocalyptic number.

It is an amenable number.

1251264017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251264017 is an equidigital number, since it uses as much as digits as its factorization.

1251264017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1251264017 is about 35373.2104423673. The cubic root of 1251264017 is about 1077.5803216376.

Adding to 1251264017 its reverse (7104621521), we get a palindrome (8355885538).

The spelling of 1251264017 in words is "one billion, two hundred fifty-one million, two hundred sixty-four thousand, seventeen".