12840454 has 8 divisors (see below), whose sum is σ = 21011688. Its totient is φ = 5836560.

The previous prime is 12840427. The next prime is 12840461. The reversal of 12840454 is 45404821.

12840454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×12840454² = 329754517852232, which contains 22 as substring.

It is a congruent 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, 291807 + ... + 291850.

It is an arithmetic number, because the mean of its divisors is an integer number (2626461).

Almost surely, 2^12840454 is an apocalyptic number.

12840454 is a deficient number, since it is larger than the sum of its proper divisors (8171234).

12840454 is a wasteful number, since it uses less digits than its factorization.

12840454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583670.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 12840454 is about 3583.3579223963. The cubic root of 12840454 is about 234.1675936748.

The spelling of 12840454 in words is "twelve million, eight hundred forty thousand, four hundred fifty-four".