12991454 has 8 divisors (see below), whose sum is σ = 22271088. Its totient is φ = 5567760.

The previous prime is 12991453. The next prime is 12991457. The reversal of 12991454 is 45419921.

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

It is a super-3 number, since 3×12991454³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12991453) 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, 463967 + ... + 463994.

It is an arithmetic number, because the mean of its divisors is an integer number (2783886).

Almost surely, 2^12991454 is an apocalyptic number.

12991454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12991454 is a deficient number, since it is larger than the sum of its proper divisors (9279634).

12991454 is an equidigital number, since it uses as much as digits as its factorization.

12991454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927970.

The product of its digits is 12960, while the sum is 35.

The square root of 12991454 is about 3604.3659636613. The cubic root of 12991454 is about 235.0819331025.

The spelling of 12991454 in words is "twelve million, nine hundred ninety-one thousand, four hundred fifty-four".