1206745 has 8 divisors (see below), whose sum is σ = 1533384. Its totient is φ = 908544.

The previous prime is 1206743. The next prime is 1206749. The reversal of 1206745 is 5476021.

It can be written as a sum of positive squares in 4 ways, for example, as 635209 + 571536 = 797^2 + 756^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1206745 - 2¹ = 1206743 is a prime.

It is a Duffinian number.

1206745 is a lucky number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1206743) 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 7 ways as a sum of consecutive naturals, for example, 7014 + ... + 7183.

It is an arithmetic number, because the mean of its divisors is an integer number (191673).

2^1206745 is an apocalyptic number.

It is an amenable number.

1206745 is a deficient number, since it is larger than the sum of its proper divisors (326639).

1206745 is a wasteful number, since it uses less digits than its factorization.

1206745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14219.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1206745 is about 1098.5194581800. The cubic root of 1206745 is about 106.4645859314.

It can be divided in two parts, 1206 and 745, that multiplied together give a triangular number (898470 = T₁₃₄₀).

The spelling of 1206745 in words is "one million, two hundred six thousand, seven hundred forty-five".