1245216 has 96 divisors (see below), whose sum is σ = 3991680. Its totient is φ = 331776.

The previous prime is 1245191. The next prime is 1245217. The reversal of 1245216 is 6125421.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1245192 and 1245201.

It is not an unprimeable number, because it can be changed into a prime (1245217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11370 + ... + 11478.

It is an arithmetic number, because the mean of its divisors is an integer number (41580).

2^1245216 is an apocalyptic number.

1245216 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 1245216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1995840).

1245216 is an abundant number, since it is smaller than the sum of its proper divisors (2746464).

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

1245216 is a wasteful number, since it uses less digits than its factorization.

1245216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 138 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 1245216 is about 1115.8924679377. The cubic root of 1245216 is about 107.5841346038.

The spelling of 1245216 in words is "one million, two hundred forty-five thousand, two hundred sixteen".