1405249 has 2 divisors, whose sum is σ = 1405250. Its totient is φ = 1405248.

The previous prime is 1405247. The next prime is 1405267. The reversal of 1405249 is 9425041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1404225 + 1024 = 1185^2 + 32^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405249 - 2¹ = 1405247 is a prime.

Together with 1405247, it forms a pair of twin primes.

1405249 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1405241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702624 + 702625.

It is an arithmetic number, because the mean of its divisors is an integer number (702625).

2^1405249 is an apocalyptic number.

It is an amenable number.

1405249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405249 is an equidigital number, since it uses as much as digits as its factorization.

1405249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1405249 is about 1185.4319887703. The cubic root of 1405249 is about 112.0085293249.

The spelling of 1405249 in words is "one million, four hundred five thousand, two hundred forty-nine".