981506 has 8 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 489028.

The previous prime is 981493. The next prime is 981517. The reversal of 981506 is 605189.

981506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (184680).

2⁹⁸¹⁵⁰⁶ is an apocalyptic number.

981506 is a deficient number, since it is larger than the sum of its proper divisors (495934).

981506 is a wasteful number, since it uses less digits than its factorization.

981506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 981506 is about 990.7098465242. The cubic root of 981506 is about 99.3796934877.

The spelling of 981506 in words is "nine hundred eighty-one thousand, five hundred six".