6861406 has 8 divisors (see below), whose sum is σ = 10739664. Its totient is φ = 3281520.

The previous prime is 6861401. The next prime is 6861409. The reversal of 6861406 is 6041686.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6861401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74535 + ... + 74626.

It is an arithmetic number, because the mean of its divisors is an integer number (1342458).

Almost surely, 2^6861406 is an apocalyptic number.

6861406 is a deficient number, since it is larger than the sum of its proper divisors (3878258).

6861406 is a wasteful number, since it uses less digits than its factorization.

6861406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149186.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6861406 is about 2619.4285636375. The cubic root of 6861406 is about 190.0222134693.

The spelling of 6861406 in words is "six million, eight hundred sixty-one thousand, four hundred six".