12891401 has 4 divisors (see below), whose sum is σ = 12963600. Its totient is φ = 12819204.

The previous prime is 12891353. The next prime is 12891409. The reversal of 12891401 is 10419821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10419821 = 1579 ⋅6599.

It is a cyclic number.

It is not a de Polignac number, because 12891401 - 2²² = 8697097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12891409) 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, 35831 + ... + 36188.

It is an arithmetic number, because the mean of its divisors is an integer number (3240900).

Almost surely, 2^12891401 is an apocalyptic number.

It is an amenable number.

12891401 is a deficient number, since it is larger than the sum of its proper divisors (72199).

12891401 is an equidigital number, since it uses as much as digits as its factorization.

12891401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72198.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 12891401 is about 3590.4597198688. The cubic root of 12891401 is about 234.4768868068.

The spelling of 12891401 in words is "twelve million, eight hundred ninety-one thousand, four hundred one".