6781425 has 24 divisors (see below), whose sum is σ = 12814656. Its totient is φ = 3099840.

The previous prime is 6781409. The next prime is 6781433. The reversal of 6781425 is 5241876.

6781425 = 49² + 50² + ... + 273².

6781425 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6781425 - 2⁴ = 6781409 is a prime.

It is an Ulam number.

It is a Curzon number.

6781425 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5934 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (533944).

Almost surely, 2^6781425 is an apocalyptic number.

It is an amenable number.

6781425 is a deficient number, since it is larger than the sum of its proper divisors (6033231).

6781425 is a wasteful number, since it uses less digits than its factorization.

6781425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12937 (or 12932 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 6781425 is about 2604.1169328584. The cubic root of 6781425 is about 189.2809851503.

The spelling of 6781425 in words is "six million, seven hundred eighty-one thousand, four hundred twenty-five".