9981401 has 4 divisors (see below), whose sum is σ = 10017204. Its totient is φ = 9945600.

The previous prime is 9981383. The next prime is 9981463. The reversal of 9981401 is 1041899.

9981401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1041899 = 83 ⋅12553.

It can be written as a sum of positive squares in 2 ways, for example, as 7728400 + 2253001 = 2780^2 + 1501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9981401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9981001) 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, 17480 + ... + 18041.

It is an arithmetic number, because the mean of its divisors is an integer number (2504301).

Almost surely, 2^9981401 is an apocalyptic number.

It is an amenable number.

9981401 is a deficient number, since it is larger than the sum of its proper divisors (35803).

9981401 is a wasteful number, since it uses less digits than its factorization.

9981401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35802.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 9981401 is about 3159.3355314053. The cubic root of 9981401 is about 215.3098183406.

The spelling of 9981401 in words is "nine million, nine hundred eighty-one thousand, four hundred one".