12653421 has 16 divisors (see below), whose sum is σ = 18551808. Its totient is φ = 7607600.

The previous prime is 12653357. The next prime is 12653429. The reversal of 12653421 is 12435621.

It is not a de Polignac number, because 12653421 - 2⁶ = 12653357 is a prime.

It is a super-5 number, since 5×12653421⁵ (a number of 37 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12653391 and 12653400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12653429) 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 15 ways as a sum of consecutive naturals, for example, 2860 + ... + 5786.

It is an arithmetic number, because the mean of its divisors is an integer number (1159488).

Almost surely, 2^12653421 is an apocalyptic number.

12653421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12653421 is a deficient number, since it is larger than the sum of its proper divisors (5898387).

12653421 is a wasteful number, since it uses less digits than its factorization.

12653421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072.

The product of its digits is 1440, while the sum is 24.

The square root of 12653421 is about 3557.1647417571. The cubic root of 12653421 is about 233.0250729771.

The spelling of 12653421 in words is "twelve million, six hundred fifty-three thousand, four hundred twenty-one".