1105531 has 4 divisors (see below), whose sum is σ = 1263472. Its totient is φ = 947592.

The previous prime is 1105519. The next prime is 1105537. The reversal of 1105531 is 1355011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1355011 = 7 ⋅193573.

It is a cyclic number.

It is not a de Polignac number, because 1105531 - 2⁹ = 1105019 is a prime.

It is a super-2 number, since 2×1105531² = 2444397583922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1105537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78960 + ... + 78973.

It is an arithmetic number, because the mean of its divisors is an integer number (315868).

2^1105531 is an apocalyptic number.

1105531 is a deficient number, since it is larger than the sum of its proper divisors (157941).

1105531 is an equidigital number, since it uses as much as digits as its factorization.

1105531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157940.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 1105531 is about 1051.4423426893. The cubic root of 1105531 is about 103.4007387706.

The spelling of 1105531 in words is "one million, one hundred five thousand, five hundred thirty-one".