1405939 has 2 divisors, whose sum is σ = 1405940. Its totient is φ = 1405938.

The previous prime is 1405927. The next prime is 1405979. The reversal of 1405939 is 9395041.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405939 is a prime.

It is a Chen prime.

1405939 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405939.

It is not a weakly prime, because it can be changed into another prime (1405919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702969 + 702970.

It is an arithmetic number, because the mean of its divisors is an integer number (702970).

2^1405939 is an apocalyptic number.

1405939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405939 is an equidigital number, since it uses as much as digits as its factorization.

1405939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 1405939 is about 1185.7229861987. The cubic root of 1405939 is about 112.0268589920.

The spelling of 1405939 in words is "one million, four hundred five thousand, nine hundred thirty-nine".