1276741632 has 96 divisors (see below), whose sum is σ = 3583288800. Its totient is φ = 403144704.

The previous prime is 1276741619. The next prime is 1276741637. The reversal of 1276741632 is 2361476721.

It is a tau number, because it is divible by the number of its divisors (96).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1276741637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111268 + ... + 122204.

It is an arithmetic number, because the mean of its divisors is an integer number (37325925).

Almost surely, 2^1276741632 is an apocalyptic number.

1276741632 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 1276741632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1791644400).

1276741632 is an abundant number, since it is smaller than the sum of its proper divisors (2306547168).

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

1276741632 is a wasteful number, since it uses less digits than its factorization.

1276741632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10981 (or 10961 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 1276741632 is about 35731.5215461083. The cubic root of 1276741632 is about 1084.8449542373.

The spelling of 1276741632 in words is "one billion, two hundred seventy-six million, seven hundred forty-one thousand, six hundred thirty-two".