1161645 has 16 divisors (see below), whose sum is σ = 1902912. Its totient is φ = 604800.

The previous prime is 1161637. The next prime is 1161647. The reversal of 1161645 is 5461611.

It is not a de Polignac number, because 1161645 - 2³ = 1161637 is a prime.

It is a super-3 number, since 3×1161645³ = 4702637872255233375, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161647) 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, 256 + ... + 1545.

It is an arithmetic number, because the mean of its divisors is an integer number (118932).

2^1161645 is an apocalyptic number.

1161645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1161645 is a deficient number, since it is larger than the sum of its proper divisors (741267).

1161645 is a wasteful number, since it uses less digits than its factorization.

1161645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852.

The product of its digits is 720, while the sum is 24.

The square root of 1161645 is about 1077.7963629555. The cubic root of 1161645 is about 105.1214015310.

The spelling of 1161645 in words is "one million, one hundred sixty-one thousand, six hundred forty-five".