6861915 has 20 divisors (see below), whose sum is σ = 12301344. Its totient is φ = 3659472.

The previous prime is 6861913. The next prime is 6861923. The reversal of 6861915 is 5191686.

It is not a de Polignac number, because 6861915 - 2¹ = 6861913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6861915.

It is not an unprimeable number, because it can be changed into a prime (6861913) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8067 + ... + 8876.

Almost surely, 2^6861915 is an apocalyptic number.

6861915 is a deficient number, since it is larger than the sum of its proper divisors (5439429).

6861915 is a wasteful number, since it uses less digits than its factorization.

6861915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16960 (or 16951 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 6861915 is about 2619.5257204311. The cubic root of 6861915 is about 190.0269121620.

It can be divided in two parts, 6861 and 915, that added together give a 5-th power (7776 = 6⁵).

The spelling of 6861915 in words is "six million, eight hundred sixty-one thousand, nine hundred fifteen".