1321429 has 2 divisors, whose sum is σ = 1321430. Its totient is φ = 1321428.

The previous prime is 1321421. The next prime is 1321447. The reversal of 1321429 is 9241231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 10404 = 1145^2 + 102^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321429 - 2³ = 1321421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660714 + 660715.

It is an arithmetic number, because the mean of its divisors is an integer number (660715).

2^1321429 is an apocalyptic number.

It is an amenable number.

1321429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321429 is an equidigital number, since it uses as much as digits as its factorization.

1321429 is an evil number, because the sum of its binary digits is even.

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

The square root of 1321429 is about 1149.5342535131. The cubic root of 1321429 is about 109.7357015635.

The spelling of 1321429 in words is "one million, three hundred twenty-one thousand, four hundred twenty-nine".