1431491 has 2 divisors, whose sum is σ = 1431492. Its totient is φ = 1431490.

The previous prime is 1431467. The next prime is 1431503. The reversal of 1431491 is 1941341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1431491 - 2¹⁸ = 1169347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1431421) 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, 715745 + 715746.

It is an arithmetic number, because the mean of its divisors is an integer number (715746).

2^1431491 is an apocalyptic number.

1431491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431491 is an equidigital number, since it uses as much as digits as its factorization.

1431491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 1431491 is about 1196.4493303103. The cubic root of 1431491 is about 112.7014595966.

The spelling of 1431491 in words is "one million, four hundred thirty-one thousand, four hundred ninety-one".