1271732670 has 128 divisors (see below), whose sum is σ = 3741655680. Its totient is φ = 305372160.

The previous prime is 1271732663. The next prime is 1271732677. The reversal of 1271732670 is 762371721.

It is an interprime number because it is at equal distance from previous prime (1271732663) and next prime (1271732677).

It is a super-5 number, since 5×1271732670⁵ (a number of 47 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271732677) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 139492 + ... + 148328.

It is an arithmetic number, because the mean of its divisors is an integer number (29231685).

Almost surely, 2^1271732670 is an apocalyptic number.

1271732670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271732670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1870827840).

1271732670 is an abundant number, since it is smaller than the sum of its proper divisors (2469923010).

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

1271732670 is a wasteful number, since it uses less digits than its factorization.

1271732670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8907 (or 8901 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 1271732670 is about 35661.3610228213. The cubic root of 1271732670 is about 1083.4243930295.

The spelling of 1271732670 in words is "one billion, two hundred seventy-one million, seven hundred thirty-two thousand, six hundred seventy".