11857481 has 2 divisors, whose sum is σ = 11857482. Its totient is φ = 11857480.

The previous prime is 11857477. The next prime is 11857493. The reversal of 11857481 is 18475811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10627600 + 1229881 = 3260^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 11857481 - 2² = 11857477 is a prime.

It is a super-2 number, since 2×11857481² = 281199711330722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11857451) 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 as a sum of consecutive naturals, namely, 5928740 + 5928741.

It is an arithmetic number, because the mean of its divisors is an integer number (5928741).

Almost surely, 2^11857481 is an apocalyptic number.

It is an amenable number.

11857481 is a deficient number, since it is larger than the sum of its proper divisors (1).

11857481 is an equidigital number, since it uses as much as digits as its factorization.

11857481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 35.

The square root of 11857481 is about 3443.4693261303. The cubic root of 11857481 is about 228.0328835817.

The spelling of 11857481 in words is "eleven million, eight hundred fifty-seven thousand, four hundred eighty-one".