1272685620 has 96 divisors (see below), whose sum is σ = 3861019008. Its totient is φ = 311980032.

The previous prime is 1272685597. The next prime is 1272685627. The reversal of 1272685620 is 265862721.

1272685620 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272685627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29352 + ... + 58368.

It is an arithmetic number, because the mean of its divisors is an integer number (40218948).

Almost surely, 2^1272685620 is an apocalyptic number.

1272685620 is a gapful number since it is divisible by the number (10) 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 1272685620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1930509504).

1272685620 is an abundant number, since it is smaller than the sum of its proper divisors (2588333388).

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

1272685620 is a wasteful number, since it uses less digits than its factorization.

1272685620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29089 (or 29087 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1272685620 is about 35674.7196204820. The cubic root of 1272685620 is about 1083.6949403242.

It can be divided in two parts, 12726 and 85620, that added together give a triangular number (98346 = T₄₄₃).

The spelling of 1272685620 in words is "one billion, two hundred seventy-two million, six hundred eighty-five thousand, six hundred twenty".