1309144 has 8 divisors (see below), whose sum is σ = 2454660. Its totient is φ = 654568.

The previous prime is 1309129. The next prime is 1309163. The reversal of 1309144 is 4419031.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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, 81814 + ... + 81829.

2^1309144 is an apocalyptic number.

It is an amenable number.

1309144 is a deficient number, since it is larger than the sum of its proper divisors (1145516).

1309144 is a wasteful number, since it uses less digits than its factorization.

1309144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163649 (or 163645 counting only the distinct ones).

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

The square root of 1309144 is about 1144.1783077825. The cubic root of 1309144 is about 109.3945803313.

The spelling of 1309144 in words is "one million, three hundred nine thousand, one hundred forty-four".