1271726652 has 96 divisors (see below), whose sum is σ = 3434522112. Its totient is φ = 358753536.

The previous prime is 1271726627. The next prime is 1271726663. The reversal of 1271726652 is 2566271721.

It is a self number, because there is not a number n which added to its sum of digits gives 1271726652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4011598 + ... + 4011914.

It is an arithmetic number, because the mean of its divisors is an integer number (35776272).

Almost surely, 2^1271726652 is an apocalyptic number.

1271726652 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 1271726652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1717261056).

1271726652 is an abundant number, since it is smaller than the sum of its proper divisors (2162795460).

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

1271726652 is a wasteful number, since it uses less digits than its factorization.

1271726652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 785 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 1271726652 is about 35661.2766456839. The cubic root of 1271726652 is about 1083.4226840597.

The spelling of 1271726652 in words is "one billion, two hundred seventy-one million, seven hundred twenty-six thousand, six hundred fifty-two".