1403641 has 2 divisors, whose sum is σ = 1403642. Its totient is φ = 1403640.

The previous prime is 1403627. The next prime is 1403651. The reversal of 1403641 is 1463041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1371241 + 32400 = 1171^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1403641 - 2⁵ = 1403609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1403651) 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, 701820 + 701821.

It is an arithmetic number, because the mean of its divisors is an integer number (701821).

2^1403641 is an apocalyptic number.

It is an amenable number.

1403641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403641 is an equidigital number, since it uses as much as digits as its factorization.

1403641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1403641 is about 1184.7535608725. The cubic root of 1403641 is about 111.9657899344.

Adding to 1403641 its reverse (1463041), we get a palindrome (2866682).

The spelling of 1403641 in words is "one million, four hundred three thousand, six hundred forty-one".