1271606540 has 24 divisors (see below), whose sum is σ = 2810920560. Its totient is φ = 481871808.

The previous prime is 1271606533. The next prime is 1271606561. The reversal of 1271606540 is 456061721.

It is a junction number, because it is equal to n+sod(n) for n = 1271606497 and 1271606506.

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, 1672787 + ... + 1673546.

It is an arithmetic number, because the mean of its divisors is an integer number (117121690).

Almost surely, 2^1271606540 is an apocalyptic number.

1271606540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271606540 is an abundant number, since it is smaller than the sum of its proper divisors (1539314020).

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

1271606540 is a wasteful number, since it uses less digits than its factorization.

1271606540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346361 (or 3346359 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1271606540 is about 35659.5925383339. The cubic root of 1271606540 is about 1083.3885739616.

The spelling of 1271606540 in words is "one billion, two hundred seventy-one million, six hundred six thousand, five hundred forty".