891401 has 4 divisors (see below), whose sum is σ = 1018752. Its totient is φ = 764052.

The previous prime is 891391. The next prime is 891409. The reversal of 891401 is 104198.

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.

It is a cyclic number.

It is not a de Polignac number, because 891401 - 2¹⁰ = 890377 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891401.

It is not an unprimeable number, because it can be changed into a prime (891409) 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, 63665 + ... + 63678.

It is an arithmetic number, because the mean of its divisors is an integer number (254688).

2⁸⁹¹⁴⁰¹ is an apocalyptic number.

It is an amenable number.

891401 is a deficient number, since it is larger than the sum of its proper divisors (127351).

891401 is a wasteful number, since it uses less digits than its factorization.

891401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127350.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 891401 is about 944.1403497362. The cubic root of 891401 is about 96.2404634392.

Adding to 891401 its reverse (104198), we get a palindrome (995599).

The spelling of 891401 in words is "eight hundred ninety-one thousand, four hundred one".