12601381 has 8 divisors (see below), whose sum is σ = 13696760. Its totient is φ = 11524032.

The previous prime is 12601373. The next prime is 12601387. The reversal of 12601381 is 18310621.

It can be written as a sum of positive squares in 4 ways, for example, as 112225 + 12489156 = 335^2 + 3534^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12601381 - 2³ = 12601373 is a prime.

It is a super-2 number, since 2×12601381² = 317589606214322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12601387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3030 + ... + 5863.

It is an arithmetic number, because the mean of its divisors is an integer number (1712095).

Almost surely, 2^12601381 is an apocalyptic number.

It is an amenable number.

12601381 is a deficient number, since it is larger than the sum of its proper divisors (1095379).

12601381 is a wasteful number, since it uses less digits than its factorization.

12601381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9015.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 12601381 is about 3549.8423908675. The cubic root of 12601381 is about 232.7051782660.

The spelling of 12601381 in words is "twelve million, six hundred one thousand, three hundred eighty-one".