1251315463 has 2 divisors, whose sum is σ = 1251315464. Its totient is φ = 1251315462.

The previous prime is 1251315371. The next prime is 1251315473. The reversal of 1251315463 is 3645131521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1251315463 - 2¹³ = 1251307271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251315473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625657731 + 625657732.

It is an arithmetic number, because the mean of its divisors is an integer number (625657732).

Almost surely, 2^1251315463 is an apocalyptic number.

1251315463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251315463 is an equidigital number, since it uses as much as digits as its factorization.

1251315463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 1251315463 is about 35373.9376236234. The cubic root of 1251315463 is about 1077.5950897539.

Adding to 1251315463 its reverse (3645131521), we get a palindrome (4896446984).

The spelling of 1251315463 in words is "one billion, two hundred fifty-one million, three hundred fifteen thousand, four hundred sixty-three".