1265216 has 28 divisors (see below), whose sum is σ = 2564892. Its totient is φ = 619008.

The previous prime is 1265197. The next prime is 1265233. The reversal of 1265216 is 6125621.

It can be written as a sum of positive squares in 2 ways, for example, as 802816 + 462400 = 896^2 + 680^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1265191 and 1265200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3206 + ... + 3578.

2^1265216 is an apocalyptic number.

1265216 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 1265216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1282446).

1265216 is an abundant number, since it is smaller than the sum of its proper divisors (1299676).

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

1265216 is an equidigital number, since it uses as much as digits as its factorization.

1265216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 428 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 1265216 is about 1124.8182075340. The cubic root of 1265216 is about 108.1570645656.

The spelling of 1265216 in words is "one million, two hundred sixty-five thousand, two hundred sixteen".