1287853481 has 16 divisors (see below), whose sum is σ = 1320926208. Its totient is φ = 1255338000.

The previous prime is 1287853453. The next prime is 1287853499. The reversal of 1287853481 is 1843587821.

It is a cyclic number.

It is not a de Polignac number, because 1287853481 - 2¹⁸ = 1287591337 is a prime.

It is a super-2 number, since 2×1287853481² = 3317133177047634722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1287853081) 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, 2644220 + ... + 2644706.

It is an arithmetic number, because the mean of its divisors is an integer number (82557888).

Almost surely, 2^1287853481 is an apocalyptic number.

It is an amenable number.

1287853481 is a deficient number, since it is larger than the sum of its proper divisors (33072727).

1287853481 is a wasteful number, since it uses less digits than its factorization.

1287853481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932.

The product of its digits is 430080, while the sum is 47.

The square root of 1287853481 is about 35886.6755356358. The cubic root of 1287853481 is about 1087.9831067271.

The spelling of 1287853481 in words is "one billion, two hundred eighty-seven million, eight hundred fifty-three thousand, four hundred eighty-one".