1399216 has 60 divisors (see below), whose sum is σ = 3447696. Its totient is φ = 535680.

The previous prime is 1399213. The next prime is 1399231. The reversal of 1399216 is 6129931.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (1399213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45121 + ... + 45151.

2^1399216 is an apocalyptic number.

1399216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723848).

1399216 is an abundant number, since it is smaller than the sum of its proper divisors (2048480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1399216 is a wasteful number, since it uses less digits than its factorization.

1399216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 53 counting only the distinct ones).

The product of its digits is 2916, while the sum is 31.

The square root of 1399216 is about 1182.8846097570. The cubic root of 1399216 is about 111.8480081153.

The spelling of 1399216 in words is "one million, three hundred ninety-nine thousand, two hundred sixteen".