1206945 has 12 divisors (see below), whose sum is σ = 2092116. Its totient is φ = 643680.

The previous prime is 1206941. The next prime is 1206973. The reversal of 1206945 is 5496021.

It can be written as a sum of positive squares in 2 ways, for example, as 767376 + 439569 = 876^2 + 663^2 .

It is not a de Polignac number, because 1206945 - 2² = 1206941 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1206941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13366 + ... + 13455.

It is an arithmetic number, because the mean of its divisors is an integer number (174343).

2^1206945 is an apocalyptic number.

1206945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1206945 is a deficient number, since it is larger than the sum of its proper divisors (885171).

1206945 is a wasteful number, since it uses less digits than its factorization.

1206945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26832 (or 26829 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1206945 is about 1098.6104860231. The cubic root of 1206945 is about 106.4704672460.

The spelling of 1206945 in words is "one million, two hundred six thousand, nine hundred forty-five".