978115 has 8 divisors (see below), whose sum is σ = 1196208. Its totient is φ = 767520.

The previous prime is 978113. The next prime is 978149. The reversal of 978115 is 511879.

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

It is not a de Polignac number, because 978115 - 2¹ = 978113 is a prime.

It is a super-3 number, since 3×978115³ = 2807314133351012625, which contains 333 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (978113) 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, 1581 + ... + 2110.

It is an arithmetic number, because the mean of its divisors is an integer number (149526).

2⁹⁷⁸¹¹⁵ is an apocalyptic number.

978115 is a deficient number, since it is larger than the sum of its proper divisors (218093).

978115 is a wasteful number, since it uses less digits than its factorization.

978115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749.

The product of its digits is 2520, while the sum is 31.

The square root of 978115 is about 988.9969666283. The cubic root of 978115 is about 99.2651126350.

The spelling of 978115 in words is "nine hundred seventy-eight thousand, one hundred fifteen".