978501 has 8 divisors (see below), whose sum is σ = 1326304. Its totient is φ = 641520.

The previous prime is 978491. The next prime is 978511. The reversal of 978501 is 105879.

It is an interprime number because it is at equal distance from previous prime (978491) and next prime (978511).

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

It is not a de Polignac number, because 978501 - 2¹¹ = 976453 is a prime.

It is a Duffinian number.

978501 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978501.

It is not an unprimeable number, because it can be changed into a prime (978511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2491 + ... + 2856.

It is an arithmetic number, because the mean of its divisors is an integer number (165788).

2⁹⁷⁸⁵⁰¹ is an apocalyptic number.

It is an amenable number.

978501 is a deficient number, since it is larger than the sum of its proper divisors (347803).

978501 is a wasteful number, since it uses less digits than its factorization.

978501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5411.

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

The square root of 978501 is about 989.1920945903. The cubic root of 978501 is about 99.2781688006.

The spelling of 978501 in words is "nine hundred seventy-eight thousand, five hundred one".