1309429 has 4 divisors (see below), whose sum is σ = 1428480. Its totient is φ = 1190380.

The previous prime is 1309421. The next prime is 1309463. The reversal of 1309429 is 9249031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9249031 = 11 ⋅840821.

It is a cyclic number.

It is not a de Polignac number, because 1309429 - 2³ = 1309421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1309397 and 1309406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59509 + ... + 59530.

It is an arithmetic number, because the mean of its divisors is an integer number (357120).

2^1309429 is an apocalyptic number.

It is an amenable number.

1309429 is a deficient number, since it is larger than the sum of its proper divisors (119051).

1309429 is a wasteful number, since it uses less digits than its factorization.

1309429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119050.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1309429 is about 1144.3028445302. The cubic root of 1309429 is about 109.4025181372.

It can be divided in two parts, 130 and 9429, that added together give a palindrome (9559).

The spelling of 1309429 in words is "one million, three hundred nine thousand, four hundred twenty-nine".