1404649 has 2 divisors, whose sum is σ = 1404650. Its totient is φ = 1404648.

The previous prime is 1404643. The next prime is 1404653. The reversal of 1404649 is 9464041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 59049 = 1160^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 1404649 - 2⁵ = 1404617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1404643) 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, 702324 + 702325.

It is an arithmetic number, because the mean of its divisors is an integer number (702325).

2^1404649 is an apocalyptic number.

It is an amenable number.

1404649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1404649 is an equidigital number, since it uses as much as digits as its factorization.

1404649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1404649 is about 1185.1788894509. The cubic root of 1404649 is about 111.9925856061.

The spelling of 1404649 in words is "one million, four hundred four thousand, six hundred forty-nine".