12420955 has 4 divisors (see below), whose sum is σ = 14905152. Its totient is φ = 9936760.

The previous prime is 12420923. The next prime is 12420973. The reversal of 12420955 is 55902421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55902421 = 281 ⋅198941.

It is not a de Polignac number, because 12420955 - 2⁵ = 12420923 is a prime.

It is a super-2 number, since 2×12420955² = 308560246224050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242091 + ... + 1242100.

It is an arithmetic number, because the mean of its divisors is an integer number (3726288).

Almost surely, 2^12420955 is an apocalyptic number.

12420955 is a deficient number, since it is larger than the sum of its proper divisors (2484197).

12420955 is an equidigital number, since it uses as much as digits as its factorization.

12420955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484196.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 12420955 is about 3524.3375264012. The cubic root of 12420955 is about 231.5892143710.

The spelling of 12420955 in words is "twelve million, four hundred twenty thousand, nine hundred fifty-five".