981361 has 4 divisors (see below), whose sum is σ = 986224. Its totient is φ = 976500.

The previous prime is 981319. The next prime is 981373. The reversal of 981361 is 163189.

It is a happy number.

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: 163189 = 13 ⋅12553.

It is a cyclic number.

It is not a de Polignac number, because 981361 - 2¹¹ = 979313 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981301) 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, 2115 + ... + 2536.

It is an arithmetic number, because the mean of its divisors is an integer number (246556).

2⁹⁸¹³⁶¹ is an apocalyptic number.

It is an amenable number.

981361 is a deficient number, since it is larger than the sum of its proper divisors (4863).

981361 is a wasteful number, since it uses less digits than its factorization.

981361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4862.

The product of its digits is 1296, while the sum is 28.

The square root of 981361 is about 990.6366639692. The cubic root of 981361 is about 99.3747993878.

The spelling of 981361 in words is "nine hundred eighty-one thousand, three hundred sixty-one".