1125645 has 16 divisors (see below), whose sum is σ = 1821312. Its totient is φ = 593600.

The previous prime is 1125629. The next prime is 1125647. The reversal of 1125645 is 5465211.

It is not a de Polignac number, because 1125645 - 2⁴ = 1125629 is a prime.

It is a super-3 number, since 3×1125645³ = 4278835541183133375, which contains 333 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1144 + ... + 1886.

It is an arithmetic number, because the mean of its divisors is an integer number (113832).

2^1125645 is an apocalyptic number.

1125645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1125645 is a deficient number, since it is larger than the sum of its proper divisors (695667).

1125645 is a wasteful number, since it uses less digits than its factorization.

1125645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852.

The product of its digits is 1200, while the sum is 24.

The square root of 1125645 is about 1060.9641841269. The cubic root of 1125645 is about 104.0240637117.

It can be divided in two parts, 1125 and 645, that added together give a triangular number (1770 = T₅₉).

The spelling of 1125645 in words is "one million, one hundred twenty-five thousand, six hundred forty-five".