1309442 has 16 divisors (see below), whose sum is σ = 2190240. Its totient is φ = 583488.

The previous prime is 1309421. The next prime is 1309463. The reversal of 1309442 is 2449031.

It is an interprime number because it is at equal distance from previous prime (1309421) and next prime (1309463).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368 + ... + 1659.

It is an arithmetic number, because the mean of its divisors is an integer number (136890).

2^1309442 is an apocalyptic number.

1309442 is a deficient number, since it is larger than the sum of its proper divisors (880798).

1309442 is a wasteful number, since it uses less digits than its factorization.

1309442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065.

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

The square root of 1309442 is about 1144.3085248306. The cubic root of 1309442 is about 109.4028801851.

The spelling of 1309442 in words is "one million, three hundred nine thousand, four hundred forty-two".