3204781 has 2 divisors, whose sum is σ = 3204782. Its totient is φ = 3204780.

The previous prime is 3204779. The next prime is 3204791. The reversal of 3204781 is 1874023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3006756 + 198025 = 1734^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 3204781 - 2¹ = 3204779 is a prime.

It is a super-2 number, since 2×3204781² = 20541242515922, which contains 22 as substring.

Together with 3204779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3204701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602390 + 1602391.

It is an arithmetic number, because the mean of its divisors is an integer number (1602391).

Almost surely, 2^3204781 is an apocalyptic number.

It is an amenable number.

3204781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3204781 is an equidigital number, since it uses as much as digits as its factorization.

3204781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 3204781 is about 1790.1902133572. The cubic root of 3204781 is about 147.4346124042.

The spelling of 3204781 in words is "three million, two hundred four thousand, seven hundred eighty-one".