1272632287 has 4 divisors (see below), whose sum is σ = 1290065680. Its totient is φ = 1255198896.

The previous prime is 1272632269. The next prime is 1272632299. The reversal of 1272632287 is 7822362721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1272632287 - 2¹⁹ = 1272107999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272632227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8716587 + ... + 8716732.

It is an arithmetic number, because the mean of its divisors is an integer number (322516420).

Almost surely, 2^1272632287 is an apocalyptic number.

1272632287 is a deficient number, since it is larger than the sum of its proper divisors (17433393).

1272632287 is an equidigital number, since it uses as much as digits as its factorization.

1272632287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17433392.

The product of its digits is 112896, while the sum is 40.

The square root of 1272632287 is about 35673.9721225433. The cubic root of 1272632287 is about 1083.6798023858.

The spelling of 1272632287 in words is "one billion, two hundred seventy-two million, six hundred thirty-two thousand, two hundred eighty-seven".