3426781 has 4 divisors (see below), whose sum is σ = 3451932. Its totient is φ = 3401632.

The previous prime is 3426769. The next prime is 3426811. The reversal of 3426781 is 1876243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1876243 = 479 ⋅3917.

It can be written as a sum of positive squares in 2 ways, for example, as 2924100 + 502681 = 1710^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 3426781 - 2⁷ = 3426653 is a prime.

It is a super-2 number, since 2×3426781² = 23485656043922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3426721) 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, 12370 + ... + 12643.

It is an arithmetic number, because the mean of its divisors is an integer number (862983).

Almost surely, 2^3426781 is an apocalyptic number.

It is an amenable number.

3426781 is a deficient number, since it is larger than the sum of its proper divisors (25151).

3426781 is a wasteful number, since it uses less digits than its factorization.

3426781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25150.

The product of its digits is 8064, while the sum is 31.

The square root of 3426781 is about 1851.1566654392. The cubic root of 3426781 is about 150.7632358131.

The spelling of 3426781 in words is "three million, four hundred twenty-six thousand, seven hundred eighty-one".