1206345 has 16 divisors (see below), whose sum is σ = 2206080. Its totient is φ = 551424.

The previous prime is 1206341. The next prime is 1206347. The reversal of 1206345 is 5436021.

It is a happy number.

It is not a de Polignac number, because 1206345 - 2² = 1206341 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1206341) 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, 5640 + ... + 5849.

It is an arithmetic number, because the mean of its divisors is an integer number (137880).

2^1206345 is an apocalyptic number.

1206345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1206345 is a deficient number, since it is larger than the sum of its proper divisors (999735).

1206345 is a wasteful number, since it uses less digits than its factorization.

1206345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11504.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1206345 is about 1098.3373798610. The cubic root of 1206345 is about 106.4528213524.

It can be divided in two parts, 1206 and 345, that added together give a palindrome (1551).

The spelling of 1206345 in words is "one million, two hundred six thousand, three hundred forty-five".