1206145 has 4 divisors (see below), whose sum is σ = 1447380. Its totient is φ = 964912.

The previous prime is 1206131. The next prime is 1206151. The reversal of 1206145 is 5416021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173889 + 1032256 = 417^2 + 1016^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206145 - 2⁵ = 1206113 is a prime.

It is a super-2 number, since 2×1206145² = 2909571522050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120610 + ... + 120619.

It is an arithmetic number, because the mean of its divisors is an integer number (361845).

2^1206145 is an apocalyptic number.

It is an amenable number.

1206145 is a deficient number, since it is larger than the sum of its proper divisors (241235).

1206145 is an equidigital number, since it uses as much as digits as its factorization.

1206145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241234.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1206145 is about 1098.2463293815. The cubic root of 1206145 is about 106.4469380877.

The spelling of 1206145 in words is "one million, two hundred six thousand, one hundred forty-five".