1272840192 has 216 divisors, whose sum is σ = 4007642184. Its totient is φ = 386924544.

The previous prime is 1272840169. The next prime is 1272840193. The reversal of 1272840192 is 2910482721.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272840193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15335383 + ... + 15335465.

It is an arithmetic number, because the mean of its divisors is an integer number (18553899).

Almost surely, 2^1272840192 is an apocalyptic number.

1272840192 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 1272840192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2003821092).

1272840192 is an abundant number, since it is smaller than the sum of its proper divisors (2734801992).

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

1272840192 is an frugal number, since it uses more digits than its factorization.

1272840192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1272840192 is about 35676.8859627631. The cubic root of 1272840192 is about 1083.7388113610.

The spelling of 1272840192 in words is "one billion, two hundred seventy-two million, eight hundred forty thousand, one hundred ninety-two".