12380557 has 4 divisors (see below), whose sum is σ = 14149216. Its totient is φ = 10611900.

The previous prime is 12380531. The next prime is 12380561. The reversal of 12380557 is 75508321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75508321 = 7 ⋅10786903.

It is a cyclic number.

It is not a de Polignac number, because 12380557 - 2¹⁵ = 12347789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12380507) 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, 884319 + ... + 884332.

It is an arithmetic number, because the mean of its divisors is an integer number (3537304).

Almost surely, 2^12380557 is an apocalyptic number.

It is an amenable number.

12380557 is a deficient number, since it is larger than the sum of its proper divisors (1768659).

12380557 is an equidigital number, since it uses as much as digits as its factorization.

12380557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768658.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 12380557 is about 3518.6015688054. The cubic root of 12380557 is about 231.3378675585.

Adding to 12380557 its reverse (75508321), we get a palindrome (87888878).

The spelling of 12380557 in words is "twelve million, three hundred eighty thousand, five hundred fifty-seven".