1131645 has 16 divisors (see below), whose sum is σ = 1860480. Its totient is φ = 586944.

The previous prime is 1131643. The next prime is 1131653. The reversal of 1131645 is 5461311.

It is not a de Polignac number, because 1131645 - 2¹ = 1131643 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131643) 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, 465 + ... + 1574.

It is an arithmetic number, because the mean of its divisors is an integer number (116280).

2^1131645 is an apocalyptic number.

1131645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131645 is a deficient number, since it is larger than the sum of its proper divisors (728835).

1131645 is a wasteful number, since it uses less digits than its factorization.

1131645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084.

The product of its digits is 360, while the sum is 21.

The square root of 1131645 is about 1063.7880427980. The cubic root of 1131645 is about 104.2085619921.

Adding to 1131645 its reverse (5461311), we get a palindrome (6592956).

The spelling of 1131645 in words is "one million, one hundred thirty-one thousand, six hundred forty-five".