12354021 has 12 divisors (see below), whose sum is σ = 17926272. Its totient is φ = 8198376.

The previous prime is 12354011. The next prime is 12354031. The reversal of 12354021 is 12045321.

12354021 is a `hidden beast` number, since 123 + 540 + 2 + 1 = 666.

12354021 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 an interprime number because it is at equal distance from previous prime (12354011) and next prime (12354031).

It is not a de Polignac number, because 12354021 - 2⁵ = 12353989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12353985 and 12354003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12354011) 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, 981 + ... + 5066.

It is an arithmetic number, because the mean of its divisors is an integer number (1493856).

Almost surely, 2^12354021 is an apocalyptic number.

It is an amenable number.

12354021 is a deficient number, since it is larger than the sum of its proper divisors (5572251).

12354021 is a wasteful number, since it uses less digits than its factorization.

12354021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6280 (or 6277 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12354021 is about 3514.8287298245. The cubic root of 12354021 is about 231.1724691639.

Adding to 12354021 its reverse (12045321), we get a palindrome (24399342).

The spelling of 12354021 in words is "twelve million, three hundred fifty-four thousand, twenty-one".