1287481427 has 2 divisors, whose sum is σ = 1287481428. Its totient is φ = 1287481426.

The previous prime is 1287481409. The next prime is 1287481453. The reversal of 1287481427 is 7241847821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1287481427 - 2⁸ = 1287481171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287481487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643740713 + 643740714.

It is an arithmetic number, because the mean of its divisors is an integer number (643740714).

Almost surely, 2^1287481427 is an apocalyptic number.

1287481427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287481427 is an equidigital number, since it uses as much as digits as its factorization.

1287481427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200704, while the sum is 44.

The square root of 1287481427 is about 35881.4914266394. The cubic root of 1287481427 is about 1087.8783257978.

The spelling of 1287481427 in words is "one billion, two hundred eighty-seven million, four hundred eighty-one thousand, four hundred twenty-seven".