12507121 has 8 divisors (see below), whose sum is σ = 14446944. Its totient is φ = 10701120.

The previous prime is 12507107. The next prime is 12507137. The reversal of 12507121 is 12170521.

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

It is a cyclic number.

It is not a de Polignac number, because 12507121 - 2¹³ = 12498929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12507151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33255 + ... + 33628.

It is an arithmetic number, because the mean of its divisors is an integer number (1805868).

Almost surely, 2^12507121 is an apocalyptic number.

12507121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12507121 is a deficient number, since it is larger than the sum of its proper divisors (1939823).

12507121 is a wasteful number, since it uses less digits than its factorization.

12507121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66911.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 12507121 is about 3536.5408240256. The cubic root of 12507121 is about 232.1235036534.

Adding to 12507121 its reverse (12170521), we get a palindrome (24677642).

The spelling of 12507121 in words is "twelve million, five hundred seven thousand, one hundred twenty-one".