1161545 has 24 divisors (see below), whose sum is σ = 1772928. Its totient is φ = 722400.

The previous prime is 1161529. The next prime is 1161547. The reversal of 1161545 is 5451611.

It is not a de Polignac number, because 1161545 - 2⁴ = 1161529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161545.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2480 + ... + 2910.

It is an arithmetic number, because the mean of its divisors is an integer number (73872).

2^1161545 is an apocalyptic number.

It is an amenable number.

1161545 is a deficient number, since it is larger than the sum of its proper divisors (611383).

1161545 is a wasteful number, since it uses less digits than its factorization.

1161545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 454 counting only the distinct ones).

The product of its digits is 600, while the sum is 23.

The square root of 1161545 is about 1077.7499710044. The cubic root of 1161545 is about 105.1183849921.

It can be divided in two parts, 116 and 1545, that added together give a palindrome (1661).

The spelling of 1161545 in words is "one million, one hundred sixty-one thousand, five hundred forty-five".