12949557 has 4 divisors (see below), whose sum is σ = 17266080. Its totient is φ = 8633036.

The previous prime is 12949553. The next prime is 12949571. The reversal of 12949557 is 75594921.

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 12949557 - 2² = 12949553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12949553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2158257 + ... + 2158262.

It is an arithmetic number, because the mean of its divisors is an integer number (4316520).

Almost surely, 2^12949557 is an apocalyptic number.

It is an amenable number.

12949557 is a deficient number, since it is larger than the sum of its proper divisors (4316523).

12949557 is an equidigital number, since it uses as much as digits as its factorization.

12949557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316522.

The product of its digits is 113400, while the sum is 42.

The square root of 12949557 is about 3598.5492910338. The cubic root of 12949557 is about 234.8289505246.

The spelling of 12949557 in words is "twelve million, nine hundred forty-nine thousand, five hundred fifty-seven".