981545 has 8 divisors (see below), whose sum is σ = 1189320. Its totient is φ = 777600.

The previous prime is 981527. The next prime is 981569. The reversal of 981545 is 545189.

It can be written as a sum of positive squares in 4 ways, for example, as 44521 + 937024 = 211^2 + 968^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 981545 - 2⁶ = 981481 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356 + ... + 1445.

It is an arithmetic number, because the mean of its divisors is an integer number (148665).

2⁹⁸¹⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

981545 is a deficient number, since it is larger than the sum of its proper divisors (207775).

981545 is a wasteful number, since it uses less digits than its factorization.

981545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915.

The product of its digits is 7200, while the sum is 32.

The square root of 981545 is about 990.7295291854. The cubic root of 981545 is about 99.3810097495.

The spelling of 981545 in words is "nine hundred eighty-one thousand, five hundred forty-five".