3405121 has 2 divisors, whose sum is σ = 3405122. Its totient is φ = 3405120.

The previous prime is 3405113. The next prime is 3405131. The reversal of 3405121 is 1215043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3370896 + 34225 = 1836^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 3405121 - 2³ = 3405113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3405095 and 3405104.

It is not a weakly prime, because it can be changed into another prime (3405131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1702560 + 1702561.

It is an arithmetic number, because the mean of its divisors is an integer number (1702561).

Almost surely, 2^3405121 is an apocalyptic number.

It is an amenable number.

3405121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3405121 is an equidigital number, since it uses as much as digits as its factorization.

3405121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 3405121 is about 1845.2969950661. The cubic root of 3405121 is about 150.4449160636. Note that the first 3 decimals are identical.

The spelling of 3405121 in words is "three million, four hundred five thousand, one hundred twenty-one".