1276087872 has 112 divisors (see below), whose sum is σ = 3464478720. Its totient is φ = 414392832.

The previous prime is 1276087871. The next prime is 1276087873. The reversal of 1276087872 is 2787806721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1276087871) and next prime (1276087873).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1276087871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1438213 + ... + 1439099.

Almost surely, 2^1276087872 is an apocalyptic number.

1276087872 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 1276087872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1732239360).

1276087872 is an abundant number, since it is smaller than the sum of its proper divisors (2188390848).

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

1276087872 is a wasteful number, since it uses less digits than its factorization.

1276087872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 48.

The square root of 1276087872 is about 35722.3721496767. The cubic root of 1276087872 is about 1084.6597564108.

The spelling of 1276087872 in words is "one billion, two hundred seventy-six million, eighty-seven thousand, eight hundred seventy-two".