6434781 has 16 divisors (see below), whose sum is σ = 9120000. Its totient is φ = 4027968.

The previous prime is 6434773. The next prime is 6434833. The reversal of 6434781 is 1874346.

It is not a de Polignac number, because 6434781 - 2³ = 6434773 is a prime.

It is a super-2 number, since 2×6434781² = 82812813035922, which contains 22 as substring.

6434781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6433781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2220 + ... + 4218.

It is an arithmetic number, because the mean of its divisors is an integer number (570000).

Almost surely, 2^6434781 is an apocalyptic number.

It is an amenable number.

6434781 is a deficient number, since it is larger than the sum of its proper divisors (2685219).

6434781 is a wasteful number, since it uses less digits than its factorization.

6434781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068.

The product of its digits is 16128, while the sum is 33.

The square root of 6434781 is about 2536.6870126210. The cubic root of 6434781 is about 185.9992773703. Note that the first 3 decimals are identical.

The spelling of 6434781 in words is "six million, four hundred thirty-four thousand, seven hundred eighty-one".