1272986741 has 8 divisors (see below), whose sum is σ = 1451550744. Its totient is φ = 1105943040.

The previous prime is 1272986723. The next prime is 1272986747. The reversal of 1272986741 is 1476892721.

It can be written as a sum of positive squares in 4 ways, for example, as 570206641 + 702780100 = 23879^2 + 26510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1272986741 - 2¹⁴ = 1272970357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272986747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2879840 + ... + 2880281.

It is an arithmetic number, because the mean of its divisors is an integer number (181443843).

Almost surely, 2^1272986741 is an apocalyptic number.

It is an amenable number.

1272986741 is a deficient number, since it is larger than the sum of its proper divisors (178564003).

1272986741 is a wasteful number, since it uses less digits than its factorization.

1272986741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760151.

The product of its digits is 338688, while the sum is 47.

The square root of 1272986741 is about 35678.9397404127. The cubic root of 1272986741 is about 1083.7804020088.

The spelling of 1272986741 in words is "one billion, two hundred seventy-two million, nine hundred eighty-six thousand, seven hundred forty-one".