3451681 has 2 divisors, whose sum is σ = 3451682. Its totient is φ = 3451680.

The previous prime is 3451661. The next prime is 3451699. The reversal of 3451681 is 1861543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 1018081 = 1560^2 + 1009^2 .

It is an emirp because it is prime and its reverse (1861543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3451681 - 2⁵ = 3451649 is a prime.

It is a super-2 number, since 2×3451681² = 23828203451522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3451621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1725840 + 1725841.

It is an arithmetic number, because the mean of its divisors is an integer number (1725841).

Almost surely, 2^3451681 is an apocalyptic number.

It is an amenable number.

3451681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3451681 is an equidigital number, since it uses as much as digits as its factorization.

3451681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 3451681 is about 1857.8700169818. The cubic root of 3451681 is about 151.1275182629.

It can be divided in two parts, 34 and 51681, that added together give a palindrome (51715).

The spelling of 3451681 in words is "three million, four hundred fifty-one thousand, six hundred eighty-one".