3430781 has 4 divisors (see below), whose sum is σ = 3477852. Its totient is φ = 3383712.

The previous prime is 3430771. The next prime is 3430783. The reversal of 3430781 is 1870343.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1779556 + 1651225 = 1334^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 3430781 - 2⁶ = 3430717 is a prime.

It is a super-2 number, since 2×3430781² = 23540516539922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3430781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3430783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23426 + ... + 23571.

It is an arithmetic number, because the mean of its divisors is an integer number (869463).

Almost surely, 2^3430781 is an apocalyptic number.

It is an amenable number.

3430781 is a deficient number, since it is larger than the sum of its proper divisors (47071).

3430781 is an equidigital number, since it uses as much as digits as its factorization.

3430781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47070.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 3430781 is about 1852.2367559251. The cubic root of 3430781 is about 150.8218737839.

The spelling of 3430781 in words is "three million, four hundred thirty thousand, seven hundred eighty-one".