1406387 has 2 divisors, whose sum is σ = 1406388. Its totient is φ = 1406386.

The previous prime is 1406357. The next prime is 1406389. The reversal of 1406387 is 7836041.

It is a strong prime.

It is an emirp because it is prime and its reverse (7836041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1406387 - 2¹⁰ = 1405363 is a prime.

Together with 1406389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1406389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703193 + 703194.

It is an arithmetic number, because the mean of its divisors is an integer number (703194).

2^1406387 is an apocalyptic number.

1406387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406387 is an equidigital number, since it uses as much as digits as its factorization.

1406387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1406387 is about 1185.9118854283. The cubic root of 1406387 is about 112.0387567825.

The spelling of 1406387 in words is "one million, four hundred six thousand, three hundred eighty-seven".