12077581 has 2 divisors, whose sum is σ = 12077582. Its totient is φ = 12077580.

The previous prime is 12077557. The next prime is 12077609. The reversal of 12077581 is 18577021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 1121481 = 3310^2 + 1059^2 .

It is a cyclic number.

It is not a de Polignac number, because 12077581 - 2¹¹ = 12075533 is a prime.

It is a super-2 number, since 2×12077581² = 291735925623122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12077501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6038790 + 6038791.

It is an arithmetic number, because the mean of its divisors is an integer number (6038791).

Almost surely, 2^12077581 is an apocalyptic number.

It is an amenable number.

12077581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12077581 is an equidigital number, since it uses as much as digits as its factorization.

12077581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 12077581 is about 3475.2814274530. The cubic root of 12077581 is about 229.4351672675.

The spelling of 12077581 in words is "twelve million, seventy-seven thousand, five hundred eighty-one".