981547 has 4 divisors (see below), whose sum is σ = 1121776. Its totient is φ = 841320.

The previous prime is 981527. The next prime is 981569. The reversal of 981547 is 745189.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 981547 - 2⁷ = 981419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981517) 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, 70104 + ... + 70117.

It is an arithmetic number, because the mean of its divisors is an integer number (280444).

2⁹⁸¹⁵⁴⁷ is an apocalyptic number.

981547 is a deficient number, since it is larger than the sum of its proper divisors (140229).

981547 is a wasteful number, since it uses less digits than its factorization.

981547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140228.

The product of its digits is 10080, while the sum is 34.

The square root of 981547 is about 990.7305385421. The cubic root of 981547 is about 99.3810772492.

The spelling of 981547 in words is "nine hundred eighty-one thousand, five hundred forty-seven".