1206045 has 12 divisors (see below), whose sum is σ = 2090556. Its totient is φ = 643200.

The previous prime is 1206043. The next prime is 1206053. The reversal of 1206045 is 5406021.

Added to its reverse (5406021) it gives a triangular number (6612066 = T₃₆₃₆).

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 412164 + 793881 = 642^2 + 891^2 .

It is not a de Polignac number, because 1206045 - 2¹ = 1206043 is a prime.

1206045 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13356 + ... + 13445.

It is an arithmetic number, because the mean of its divisors is an integer number (174213).

2^1206045 is an apocalyptic number.

1206045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1206045 is a deficient number, since it is larger than the sum of its proper divisors (884511).

1206045 is a wasteful number, since it uses less digits than its factorization.

1206045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26812 (or 26809 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1206045 is about 1098.2008013109. The cubic root of 1206045 is about 106.4439962115.

Adding to 1206045 its reverse (5406021), we get a triangular number (6612066 = T₃₆₃₆).

The spelling of 1206045 in words is "one million, two hundred six thousand, forty-five".