1172531 has 2 divisors, whose sum is σ = 1172532. Its totient is φ = 1172530.

The previous prime is 1172503. The next prime is 1172533. The reversal of 1172531 is 1352711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1172531 - 2⁶ = 1172467 is a prime.

It is a super-2 number, since 2×1172531² = 2749657891922, which contains 22 as substring.

Together with 1172533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1172533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586265 + 586266.

It is an arithmetic number, because the mean of its divisors is an integer number (586266).

2^1172531 is an apocalyptic number.

1172531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172531 is an equidigital number, since it uses as much as digits as its factorization.

1172531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210, while the sum is 20.

The square root of 1172531 is about 1082.8347057608. The cubic root of 1172531 is about 105.4487520914.

The spelling of 1172531 in words is "one million, one hundred seventy-two thousand, five hundred thirty-one".