1296387 has 12 divisors (see below), whose sum is σ = 1937520. Its totient is φ = 834288.

The previous prime is 1296371. The next prime is 1296391. The reversal of 1296387 is 7836921.

1296387 is a `hidden beast` number, since 12 + 9 + 638 + 7 = 666.

It is not a de Polignac number, because 1296387 - 2⁴ = 1296371 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1296187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2223 + ... + 2744.

It is an arithmetic number, because the mean of its divisors is an integer number (161460).

2^1296387 is an apocalyptic number.

1296387 is a deficient number, since it is larger than the sum of its proper divisors (641133).

1296387 is a wasteful number, since it uses less digits than its factorization.

1296387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5002 (or 4999 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1296387 is about 1138.5899173978. The cubic root of 1296387 is about 109.0380867379.

The spelling of 1296387 in words is "one million, two hundred ninety-six thousand, three hundred eighty-seven".