1273135376 has 40 divisors (see below), whose sum is σ = 2594310144. Its totient is φ = 604074240.

The previous prime is 1273135343. The next prime is 1273135393. The reversal of 1273135376 is 6735313721.

It is a happy number.

It is a super-2 number, since 2×1273135376² = 3241747371245322752, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33116 + ... + 60356.

Almost surely, 2^1273135376 is an apocalyptic number.

1273135376 is a gapful number since it is divisible by the number (16) 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 1273135376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297155072).

1273135376 is an abundant number, since it is smaller than the sum of its proper divisors (1321174768).

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

1273135376 is a wasteful number, since it uses less digits than its factorization.

1273135376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27399 (or 27393 counting only the distinct ones).

The product of its digits is 79380, while the sum is 38.

The square root of 1273135376 is about 35681.0226310850. The cubic root of 1273135376 is about 1083.8225814036.

The spelling of 1273135376 in words is "one billion, two hundred seventy-three million, one hundred thirty-five thousand, three hundred seventy-six".