1245816 has 96 divisors (see below), whose sum is σ = 3996720. Its totient is φ = 348480.

The previous prime is 1245799. The next prime is 1245817. The reversal of 1245816 is 6185421.

It is a self number, because there is not a number n which added to its sum of digits gives 1245816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95826 + ... + 95838.

2^1245816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1998360).

1245816 is an abundant number, since it is smaller than the sum of its proper divisors (2750904).

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

1245816 is a wasteful number, since it uses less digits than its factorization.

1245816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 29 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1245816 is about 1116.1612786690. The cubic root of 1245816 is about 107.6014114232.

The spelling of 1245816 in words is "one million, two hundred forty-five thousand, eight hundred sixteen".