13242381 has 4 divisors (see below), whose sum is σ = 17656512. Its totient is φ = 8828252.

The previous prime is 13242379. The next prime is 13242407. The reversal of 13242381 is 18324231.

13242381 = 1209² + 1210² + ... + 1217².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13242381 - 2¹ = 13242379 is a prime.

It is a super-2 number, since 2×13242381² = 350721309098322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13241381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207061 + ... + 2207066.

It is an arithmetic number, because the mean of its divisors is an integer number (4414128).

Almost surely, 2^13242381 is an apocalyptic number.

It is an amenable number.

13242381 is a deficient number, since it is larger than the sum of its proper divisors (4414131).

13242381 is an equidigital number, since it uses as much as digits as its factorization.

13242381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414130.

The product of its digits is 1152, while the sum is 24.

The square root of 13242381 is about 3639.0082440137. The cubic root of 13242381 is about 236.5858100652.

The spelling of 13242381 in words is "thirteen million, two hundred forty-two thousand, three hundred eighty-one".