1491403 has 2 divisors, whose sum is σ = 1491404. Its totient is φ = 1491402.

The previous prime is 1491401. The next prime is 1491407. The reversal of 1491403 is 3041941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1491403 - 2¹ = 1491401 is a prime.

Together with 1491401, it forms a pair of twin primes.

1491403 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1491401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745701 + 745702.

It is an arithmetic number, because the mean of its divisors is an integer number (745702).

2^1491403 is an apocalyptic number.

1491403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491403 is an equidigital number, since it uses as much as digits as its factorization.

1491403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1491403 is about 1221.2301175454. The cubic root of 1491403 is about 114.2523138258.

The spelling of 1491403 in words is "one million, four hundred ninety-one thousand, four hundred three".