6451406 has 12 divisors (see below), whose sum is σ = 10479312. Its totient is φ = 2977416.

The previous prime is 6451399. The next prime is 6451433. The reversal of 6451406 is 6041546.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9206 + ... + 9881.

It is an arithmetic number, because the mean of its divisors is an integer number (873276).

Almost surely, 2^6451406 is an apocalyptic number.

6451406 is a deficient number, since it is larger than the sum of its proper divisors (4027906).

6451406 is a wasteful number, since it uses less digits than its factorization.

6451406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19115 (or 19102 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6451406 is about 2539.9618107365. The cubic root of 6451406 is about 186.1593231564.

The spelling of 6451406 in words is "six million, four hundred fifty-one thousand, four hundred six".