12421953 has 12 divisors (see below), whose sum is σ = 18887440. Its totient is φ = 7845336.

The previous prime is 12421949. The next prime is 12421987. The reversal of 12421953 is 35912421.

12421953 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12421953 - 2² = 12421949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36151 + ... + 36492.

Almost surely, 2^12421953 is an apocalyptic number.

It is an amenable number.

12421953 is a deficient number, since it is larger than the sum of its proper divisors (6465487).

12421953 is a wasteful number, since it uses less digits than its factorization.

12421953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72668 (or 72665 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 12421953 is about 3524.4791104502. The cubic root of 12421953 is about 231.5954167885.

The spelling of 12421953 in words is "twelve million, four hundred twenty-one thousand, nine hundred fifty-three".