11761531 has 2 divisors, whose sum is σ = 11761532. Its totient is φ = 11761530.

The previous prime is 11761517. The next prime is 11761543. The reversal of 11761531 is 13516711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11761531 - 2⁵ = 11761499 is a prime.

It is a super-2 number, since 2×11761531² = 276667222927922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11761496 and 11761505.

It is not a weakly prime, because it can be changed into another prime (11761031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5880765 + 5880766.

It is an arithmetic number, because the mean of its divisors is an integer number (5880766).

Almost surely, 2^11761531 is an apocalyptic number.

11761531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11761531 is an equidigital number, since it uses as much as digits as its factorization.

11761531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 25.

The square root of 11761531 is about 3429.5088569648. The cubic root of 11761531 is about 227.4161410524.

The spelling of 11761531 in words is "eleven million, seven hundred sixty-one thousand, five hundred thirty-one".