1271338040 has 32 divisors (see below), whose sum is σ = 3269155680. Its totient is φ = 435887232.

The previous prime is 1271338031. The next prime is 1271338067. The reversal of 1271338040 is 408331721.

It is a junction number, because it is equal to n+sod(n) for n = 1271337994 and 1271338012.

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, 2269967 + ... + 2270526.

It is an arithmetic number, because the mean of its divisors is an integer number (102161115).

Almost surely, 2^1271338040 is an apocalyptic number.

1271338040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271338040 is an abundant number, since it is smaller than the sum of its proper divisors (1997817640).

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

1271338040 is a wasteful number, since it uses less digits than its factorization.

1271338040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540511 (or 4540507 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1271338040 is about 35655.8275741848. The cubic root of 1271338040 is about 1083.3123160157.

Adding to 1271338040 its reverse (408331721), we get a palindrome (1679669761).

The spelling of 1271338040 in words is "one billion, two hundred seventy-one million, three hundred thirty-eight thousand, forty".