1273213273725 has 48 divisors (see below), whose sum is σ = 2339137160640. Its totient is φ = 678989822400.

The previous prime is 1273213273627. The next prime is 1273213273729. The reversal of 1273213273725 is 5273723123721.

1273213273725 is a `hidden beast` number, since 1 + 273 + 2 + 1 + 3 + 2 + 7 + 372 + 5 = 666.

It is not a de Polignac number, because 1273213273725 - 2¹⁹ = 1273212749437 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273213273729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8639155 + ... + 8785295.

It is an arithmetic number, because the mean of its divisors is an integer number (48732024180).

Almost surely, 2^{1273213273725} is an apocalyptic number.

1273213273725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1273213273725 is a deficient number, since it is larger than the sum of its proper divisors (1065923886915).

1273213273725 is a wasteful number, since it uses less digits than its factorization.

1273213273725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159067 (or 159056 counting only the distinct ones).

The product of its digits is 740880, while the sum is 45.

The spelling of 1273213273725 in words is "one trillion, two hundred seventy-three billion, two hundred thirteen million, two hundred seventy-three thousand, seven hundred twenty-five".