1180645 has 4 divisors (see below), whose sum is σ = 1416780. Its totient is φ = 944512.

The previous prime is 1180643. The next prime is 1180657. The reversal of 1180645 is 5460811.

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 136161 + 1044484 = 369^2 + 1022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1180645 - 2¹ = 1180643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1180643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118060 + ... + 118069.

It is an arithmetic number, because the mean of its divisors is an integer number (354195).

2^1180645 is an apocalyptic number.

It is an amenable number.

1180645 is a deficient number, since it is larger than the sum of its proper divisors (236135).

1180645 is an equidigital number, since it uses as much as digits as its factorization.

1180645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236134.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1180645 is about 1086.5748938752. The cubic root of 1180645 is about 105.6914308483.

It can be divided in two parts, 11 and 80645, that added together give a square (80656 = 284²).

The spelling of 1180645 in words is "one million, one hundred eighty thousand, six hundred forty-five".