1145216 has 32 divisors (see below), whose sum is σ = 2386800. Its totient is φ = 546304.

The previous prime is 1145213. The next prime is 1145227. The reversal of 1145216 is 6125411.

1145216 = T₃₀₄ + T₃₀₅ + ... + T₃₂₆.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145213) 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, 2750 + ... + 3138.

2^1145216 is an apocalyptic number.

1145216 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 1145216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1193400).

1145216 is an abundant number, since it is smaller than the sum of its proper divisors (1241584).

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

1145216 is an equidigital number, since it uses as much as digits as its factorization.

1145216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 414 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 1145216 is about 1070.1476533638. The cubic root of 1145216 is about 104.6234737778.

The spelling of 1145216 in words is "one million, one hundred forty-five thousand, two hundred sixteen".