11881057 has 2 divisors, whose sum is σ = 11881058. Its totient is φ = 11881056.

The previous prime is 11881049. The next prime is 11881117. The reversal of 11881057 is 75018811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10265616 + 1615441 = 3204^2 + 1271^2 .

It is a cyclic number.

It is not a de Polignac number, because 11881057 - 2³ = 11881049 is a prime.

It is not a weakly prime, because it can be changed into another prime (11881027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5940528 + 5940529.

It is an arithmetic number, because the mean of its divisors is an integer number (5940529).

Almost surely, 2^11881057 is an apocalyptic number.

It is an amenable number.

11881057 is a deficient number, since it is larger than the sum of its proper divisors (1).

11881057 is an equidigital number, since it uses as much as digits as its factorization.

11881057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 11881057 is about 3446.8909179143. The cubic root of 11881057 is about 228.1839146516.

Adding to 11881057 its reverse (75018811), we get a palindrome (86899868).

The spelling of 11881057 in words is "eleven million, eight hundred eighty-one thousand, fifty-seven".