1273387104 has 72 divisors (see below), whose sum is σ = 3950403912. Its totient is φ = 385873920.

The previous prime is 1273387099. The next prime is 1273387117. The reversal of 1273387104 is 4017833721.

1273387104 is a `hidden beast` number, since 1 + 273 + 387 + 1 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197809 + ... + 204144.

It is an arithmetic number, because the mean of its divisors is an integer number (54866721).

Almost surely, 2^1273387104 is an apocalyptic number.

It is an amenable number.

1273387104 is an abundant number, since it is smaller than the sum of its proper divisors (2677016808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1273387104 is a wasteful number, since it uses less digits than its factorization.

1273387104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401980 (or 401969 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 1273387104 is about 35684.5499341101. The cubic root of 1273387104 is about 1083.8940088722.

The spelling of 1273387104 in words is "one billion, two hundred seventy-three million, three hundred eighty-seven thousand, one hundred four".