1273115430855 has 40 divisors (see below), whose sum is σ = 2355795936384. Its totient is φ = 657091828800.

The previous prime is 1273115430817. The next prime is 1273115430889. The reversal of 1273115430855 is 5580345113721.

1273115430855 is a `hidden beast` number, since 1 + 27 + 3 + 1 + 1 + 543 + 0 + 85 + 5 = 666.

It is not a de Polignac number, because 1273115430855 - 2⁹ = 1273115430343 is a prime.

It is a super-2 number, since 2×1273115430855² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1273115430855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 50688976 + ... + 50714085.

Almost surely, 2^{1273115430855} is an apocalyptic number.

1273115430855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1273115430855 is a deficient number, since it is larger than the sum of its proper divisors (1082680505529).

1273115430855 is a wasteful number, since it uses less digits than its factorization.

1273115430855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101403109 (or 101403100 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 1273115430855 in words is "one trillion, two hundred seventy-three billion, one hundred fifteen million, four hundred thirty thousand, eight hundred fifty-five".