1298387 has 2 divisors, whose sum is σ = 1298388. Its totient is φ = 1298386.

The previous prime is 1298371. The next prime is 1298467. The reversal of 1298387 is 7838921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1298387 - 2⁴ = 1298371 is a prime.

It is a Chen prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1298387.

It is not a weakly prime, because it can be changed into another prime (1298317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649193 + 649194.

It is an arithmetic number, because the mean of its divisors is an integer number (649194).

2^1298387 is an apocalyptic number.

1298387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298387 is an equidigital number, since it uses as much as digits as its factorization.

1298387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 1298387 is about 1139.4678582567. The cubic root of 1298387 is about 109.0941307340.

The spelling of 1298387 in words is "one million, two hundred ninety-eight thousand, three hundred eighty-seven".