1431869 has 2 divisors, whose sum is σ = 1431870. Its totient is φ = 1431868.

The previous prime is 1431851. The next prime is 1431907. The reversal of 1431869 is 9681341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1428025 + 3844 = 1195^2 + 62^2 .

It is an emirp because it is prime and its reverse (9681341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1431869 - 2⁸ = 1431613 is a prime.

It is a super-2 number, since 2×1431869² = 4100497666322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431809) 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, 715934 + 715935.

It is an arithmetic number, because the mean of its divisors is an integer number (715935).

2^1431869 is an apocalyptic number.

It is an amenable number.

1431869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431869 is an equidigital number, since it uses as much as digits as its factorization.

1431869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 1431869 is about 1196.6072872919. The cubic root of 1431869 is about 112.7113787188.

The spelling of 1431869 in words is "one million, four hundred thirty-one thousand, eight hundred sixty-nine".