1298750423651 has 2 divisors, whose sum is σ = 1298750423652. Its totient is φ = 1298750423650.

The previous prime is 1298750423623. The next prime is 1298750423669. The reversal of 1298750423651 is 1563240578921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1298750423651 - 2³⁸ = 1023872516707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1298750423593 and 1298750423602.

It is not a weakly prime, because it can be changed into another prime (1298750423671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649375211825 + 649375211826.

It is an arithmetic number, because the mean of its divisors is an integer number (649375211826).

It is a 1-persistent number, because it is pandigital, but 2⋅1298750423651 = 2597500847302 is not.

Almost surely, 2^{1298750423651} is an apocalyptic number.

1298750423651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298750423651 is an equidigital number, since it uses as much as digits as its factorization.

1298750423651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 1298750423651 in words is "one trillion, two hundred ninety-eight billion, seven hundred fifty million, four hundred twenty-three thousand, six hundred fifty-one".