1189531 has 4 divisors (see below), whose sum is σ = 1359472. Its totient is φ = 1019592.

The previous prime is 1189483. The next prime is 1189553. The reversal of 1189531 is 1359811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1359811 = 19 ⋅71569.

It is not a de Polignac number, because 1189531 - 2⁷ = 1189403 is a prime.

It is a super-2 number, since 2×1189531² = 2829967999922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1189531.

It is not an unprimeable number, because it can be changed into a prime (1189231) 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, 84960 + ... + 84973.

It is an arithmetic number, because the mean of its divisors is an integer number (339868).

2^1189531 is an apocalyptic number.

1189531 is a deficient number, since it is larger than the sum of its proper divisors (169941).

1189531 is an equidigital number, since it uses as much as digits as its factorization.

1189531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169940.

The product of its digits is 1080, while the sum is 28.

The square root of 1189531 is about 1090.6562244814. The cubic root of 1189531 is about 105.9559268538.

The spelling of 1189531 in words is "one million, one hundred eighty-nine thousand, five hundred thirty-one".