1251501005459 has 2 divisors, whose sum is σ = 1251501005460. Its totient is φ = 1251501005458.

The previous prime is 1251501005431. The next prime is 1251501005483. The reversal of 1251501005459 is 9545001051521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251501005459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251591005459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625750502729 + 625750502730.

It is an arithmetic number, because the mean of its divisors is an integer number (625750502730).

Almost surely, 2^{1251501005459} is an apocalyptic number.

1251501005459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251501005459 is an equidigital number, since it uses as much as digits as its factorization.

1251501005459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 38.

The spelling of 1251501005459 in words is "one trillion, two hundred fifty-one billion, five hundred one million, five thousand, four hundred fifty-nine".