1272326016 has 64 divisors (see below), whose sum is σ = 3639600720. Its totient is φ = 391483392.

The previous prime is 1272326009. The next prime is 1272326021. The reversal of 1272326016 is 6106232721.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122445 + ... + 132428.

Almost surely, 2^1272326016 is an apocalyptic number.

1272326016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1272326016 is an abundant number, since it is smaller than the sum of its proper divisors (2367274704).

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

1272326016 is a wasteful number, since it uses less digits than its factorization.

1272326016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254903 (or 254891 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1272326016 is about 35669.6792247982. The cubic root of 1272326016 is about 1083.5928628121.

Adding to 1272326016 its reverse (6106232721), we get a palindrome (7378558737).

The spelling of 1272326016 in words is "one billion, two hundred seventy-two million, three hundred twenty-six thousand, sixteen".