981452161 has 4 divisors (see below), whose sum is σ = 982220800. Its totient is φ = 980683524.

The previous prime is 981452117. The next prime is 981452179. The reversal of 981452161 is 161254189.

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 981452161 - 2⁹ = 981451649 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 981452161.

It is not an unprimeable number, because it can be changed into a prime (981459161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382401 + ... + 384958.

It is an arithmetic number, because the mean of its divisors is an integer number (245555200).

Almost surely, 2^981452161 is an apocalyptic number.

It is an amenable number.

981452161 is a deficient number, since it is larger than the sum of its proper divisors (768639).

981452161 is a wasteful number, since it uses less digits than its factorization.

981452161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768638.

The product of its digits is 17280, while the sum is 37.

The square root of 981452161 is about 31328.1368900227. The cubic root of 981452161 is about 993.7787634779.

The spelling of 981452161 in words is "nine hundred eighty-one million, four hundred fifty-two thousand, one hundred sixty-one".