1251463123 has 2 divisors, whose sum is σ = 1251463124. Its totient is φ = 1251463122.

The previous prime is 1251463121. The next prime is 1251463153. The reversal of 1251463123 is 3213641521.

It is a weak prime.

It is an emirp because it is prime and its reverse (3213641521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1251463123 - 2¹ = 1251463121 is a prime.

Together with 1251463121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1251463091 and 1251463100.

It is not a weakly prime, because it can be changed into another prime (1251463121) 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, 625731561 + 625731562.

It is an arithmetic number, because the mean of its divisors is an integer number (625731562).

Almost surely, 2^1251463123 is an apocalyptic number.

1251463123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251463123 is an equidigital number, since it uses as much as digits as its factorization.

1251463123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 1251463123 is about 35376.0246918729. The cubic root of 1251463123 is about 1077.6374748644.

The spelling of 1251463123 in words is "one billion, two hundred fifty-one million, four hundred sixty-three thousand, one hundred twenty-three".