1273478647259 has 48 divisors (see below), whose sum is σ = 1659452198400. Its totient is φ = 954248076288.

The previous prime is 1273478647223. The next prime is 1273478647261. The reversal of 1273478647259 is 9527468743721.

It is not a de Polignac number, because 1273478647259 - 2¹² = 1273478643163 is a prime.

It is a super-2 number, since 2×1273478647259² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1273478647195 and 1273478647204.

It is not an unprimeable number, because it can be changed into a prime (1273478647219) 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 in 47 ways as a sum of consecutive naturals, for example, 88619627 + ... + 88633995.

It is an arithmetic number, because the mean of its divisors is an integer number (34571920800).

Almost surely, 2^{1273478647259} is an apocalyptic number.

1273478647259 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1273478647259 is a deficient number, since it is larger than the sum of its proper divisors (385973551141).

1273478647259 is a wasteful number, since it uses less digits than its factorization.

1273478647259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18364 (or 18351 counting only the distinct ones).

The product of its digits is 142248960, while the sum is 65.

The spelling of 1273478647259 in words is "one trillion, two hundred seventy-three billion, four hundred seventy-eight million, six hundred forty-seven thousand, two hundred fifty-nine".