12120637 has 4 divisors (see below), whose sum is σ = 12538620. Its totient is φ = 11702656.

The previous prime is 12120631. The next prime is 12120649. The reversal of 12120637 is 73602121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4218916 + 7901721 = 2054^2 + 2811^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120637 - 2³ = 12120629 is a prime.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120631) 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, 208948 + ... + 209005.

It is an arithmetic number, because the mean of its divisors is an integer number (3134655).

Almost surely, 2^12120637 is an apocalyptic number.

It is an amenable number.

12120637 is a deficient number, since it is larger than the sum of its proper divisors (417983).

12120637 is an equidigital number, since it uses as much as digits as its factorization.

12120637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417982.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 12120637 is about 3481.4705226384. The cubic root of 12120637 is about 229.7074857307.

Adding to 12120637 its reverse (73602121), we get a palindrome (85722758).

The spelling of 12120637 in words is "twelve million, one hundred twenty thousand, six hundred thirty-seven".