1287438611 has 16 divisors (see below), whose sum is σ = 1399910400. Its totient is φ = 1179463680.

The previous prime is 1287438583. The next prime is 1287438683. The reversal of 1287438611 is 1168347821.

It is a cyclic number.

It is not a de Polignac number, because 1287438611 - 2²² = 1283244307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287438511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94190 + ... + 106988.

It is an arithmetic number, because the mean of its divisors is an integer number (87494400).

Almost surely, 2^1287438611 is an apocalyptic number.

1287438611 is a deficient number, since it is larger than the sum of its proper divisors (112471789).

1287438611 is a wasteful number, since it uses less digits than its factorization.

1287438611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12974.

The product of its digits is 64512, while the sum is 41.

The square root of 1287438611 is about 35880.8947909608. The cubic root of 1287438611 is about 1087.8662663061.

The spelling of 1287438611 in words is "one billion, two hundred eighty-seven million, four hundred thirty-eight thousand, six hundred eleven".