12420154 has 8 divisors (see below), whose sum is σ = 18681300. Its totient is φ = 6193056.

The previous prime is 12420151. The next prime is 12420211. The reversal of 12420154 is 45102421.

12420154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12089529 + 330625 = 3477^2 + 575^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12420151) 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, 7579 + ... + 9070.

Almost surely, 2^12420154 is an apocalyptic number.

12420154 is a deficient number, since it is larger than the sum of its proper divisors (6261146).

12420154 is a wasteful number, since it uses less digits than its factorization.

12420154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17024.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 12420154 is about 3524.2238861911. The cubic root of 12420154 is about 231.5842360381.

Adding to 12420154 its reverse (45102421), we get a palindrome (57522575).

The spelling of 12420154 in words is "twelve million, four hundred twenty thousand, one hundred fifty-four".