981401 has 4 divisors (see below), whose sum is σ = 999972. Its totient is φ = 962832.

The previous prime is 981397. The next prime is 981419. The reversal of 981401 is 104189.

981401 = 700² + 701².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104189 = 43 ⋅2423.

It can be written as a sum of positive squares in 2 ways, for example, as 491401 + 490000 = 701^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 981401 - 2² = 981397 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981401.

It is not an unprimeable number, because it can be changed into a prime (981451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9206 + ... + 9311.

It is an arithmetic number, because the mean of its divisors is an integer number (249993).

2⁹⁸¹⁴⁰¹ is an apocalyptic number.

981401 is the 701-st centered square number.

It is an amenable number.

981401 is a deficient number, since it is larger than the sum of its proper divisors (18571).

981401 is a wasteful number, since it uses less digits than its factorization.

981401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18570.

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

The square root of 981401 is about 990.6568528002. The cubic root of 981401 is about 99.3761495325.

The spelling of 981401 in words is "nine hundred eighty-one thousand, four hundred one".