1309216 has 24 divisors (see below), whose sum is σ = 2603664. Its totient is φ = 648000.

The previous prime is 1309211. The next prime is 1309219. The reversal of 1309216 is 6129031.

It is not an unprimeable number, because it can be changed into a prime (1309211) 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, 5091 + ... + 5341.

It is an arithmetic number, because the mean of its divisors is an integer number (108486).

2^1309216 is an apocalyptic number.

1309216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1309216 is a deficient number, since it is larger than the sum of its proper divisors (1294448).

1309216 is a wasteful number, since it uses less digits than its factorization.

1309216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1309216 is about 1144.2097709773. The cubic root of 1309216 is about 109.3965857805.

The spelling of 1309216 in words is "one million, three hundred nine thousand, two hundred sixteen".