1342409 has 2 divisors, whose sum is σ = 1342410. Its totient is φ = 1342408.

The previous prime is 1342403. The next prime is 1342423. The reversal of 1342409 is 9042431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1006009 + 336400 = 1003^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1342409 - 2⁸ = 1342153 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1342403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671204 + 671205.

It is an arithmetic number, because the mean of its divisors is an integer number (671205).

2^1342409 is an apocalyptic number.

It is an amenable number.

1342409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1342409 is an equidigital number, since it uses as much as digits as its factorization.

1342409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1342409 is about 1158.6237525616. The cubic root of 1342409 is about 110.3134037462.

It can be divided in two parts, 134 and 2409, that multiplied together give a triangular number (322806 = T₈₀₃).

The spelling of 1342409 in words is "one million, three hundred forty-two thousand, four hundred nine".