1273128192 has 360 divisors, whose sum is σ = 4451832000. Its totient is φ = 361718784.

The previous prime is 1273128169. The next prime is 1273128203. The reversal of 1273128192 is 2918213721.

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

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, 7112359 + ... + 7112537.

It is an arithmetic number, because the mean of its divisors is an integer number (12366200).

Almost surely, 2^1273128192 is an apocalyptic number.

1273128192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1273128192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2225916000).

1273128192 is an abundant number, since it is smaller than the sum of its proper divisors (3178703808).

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

1273128192 is an frugal number, since it uses more digits than its factorization.

1273128192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 191 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1273128192 is about 35680.9219611826. The cubic root of 1273128192 is about 1083.8205428154.

The spelling of 1273128192 in words is "one billion, two hundred seventy-three million, one hundred twenty-eight thousand, one hundred ninety-two".