12381457 has 16 divisors (see below), whose sum is σ = 14513472. Its totient is φ = 10437120.

The previous prime is 12381451. The next prime is 12381469. The reversal of 12381457 is 75418321.

It is a cyclic number.

It is not a de Polignac number, because 12381457 - 2⁷ = 12381329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12381451) 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 in 15 ways as a sum of consecutive naturals, for example, 13198 + ... + 14104.

It is an arithmetic number, because the mean of its divisors is an integer number (907092).

Almost surely, 2^12381457 is an apocalyptic number.

12381457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12381457 is a deficient number, since it is larger than the sum of its proper divisors (2132015).

12381457 is a wasteful number, since it uses less digits than its factorization.

12381457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008.

The product of its digits is 6720, while the sum is 31.

The square root of 12381457 is about 3518.7294581994. The cubic root of 12381457 is about 231.3434730962.

Adding to 12381457 its reverse (75418321), we get a palindrome (87799778).

The spelling of 12381457 in words is "twelve million, three hundred eighty-one thousand, four hundred fifty-seven".