12720454 has 16 divisors (see below), whose sum is σ = 20340288. Its totient is φ = 5945472.

The previous prime is 12720439. The next prime is 12720457. The reversal of 12720454 is 45402721.

It is a super-2 number, since 2×12720454² = 323619899932232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720457) 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, 4147 + ... + 6529.

It is an arithmetic number, because the mean of its divisors is an integer number (1271268).

Almost surely, 2^12720454 is an apocalyptic number.

12720454 is a deficient number, since it is larger than the sum of its proper divisors (7619834).

12720454 is a wasteful number, since it uses less digits than its factorization.

12720454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 12720454 is about 3566.5745470970. The cubic root of 12720454 is about 233.4358411276.

The spelling of 12720454 in words is "twelve million, seven hundred twenty thousand, four hundred fifty-four".