12420751 has 8 divisors (see below), whose sum is σ = 14355360. Its totient is φ = 10526208.

The previous prime is 12420721. The next prime is 12420757. The reversal of 12420751 is 15702421.

It is a happy number.

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

It is not a de Polignac number, because 12420751 - 2⁵ = 12420719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9346 + ... + 10591.

It is an arithmetic number, because the mean of its divisors is an integer number (1794420).

Almost surely, 2^12420751 is an apocalyptic number.

12420751 is a deficient number, since it is larger than the sum of its proper divisors (1934609).

12420751 is an equidigital number, since it uses as much as digits as its factorization.

12420751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20033.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 12420751 is about 3524.3085846730. The cubic root of 12420751 is about 231.5879465013.

The spelling of 12420751 in words is "twelve million, four hundred twenty thousand, seven hundred fifty-one".