981507 has 8 divisors (see below), whose sum is σ = 1333584. Its totient is φ = 641888.

The previous prime is 981493. The next prime is 981517. The reversal of 981507 is 705189.

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

It is a cyclic number.

It is not a de Polignac number, because 981507 - 2⁶ = 981443 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981507.

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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2928 + ... + 3245.

It is an arithmetic number, because the mean of its divisors is an integer number (166698).

2⁹⁸¹⁵⁰⁷ is an apocalyptic number.

981507 is a deficient number, since it is larger than the sum of its proper divisors (352077).

981507 is a wasteful number, since it uses less digits than its factorization.

981507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6229.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 981507 is about 990.7103512127. The cubic root of 981507 is about 99.3797272384.

The spelling of 981507 in words is "nine hundred eighty-one thousand, five hundred seven".