3401561 has 2 divisors, whose sum is σ = 3401562. Its totient is φ = 3401560.

The previous prime is 3401557. The next prime is 3401569. The reversal of 3401561 is 1651043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3400336 + 1225 = 1844^2 + 35^2 .

It is a cyclic number.

It is not a de Polignac number, because 3401561 - 2² = 3401557 is a prime.

It is not a weakly prime, because it can be changed into another prime (3401569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1700780 + 1700781.

It is an arithmetic number, because the mean of its divisors is an integer number (1700781).

Almost surely, 2^3401561 is an apocalyptic number.

It is an amenable number.

3401561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3401561 is an equidigital number, since it uses as much as digits as its factorization.

3401561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 3401561 is about 1844.3321284411. The cubic root of 3401561 is about 150.3924685238.

The spelling of 3401561 in words is "three million, four hundred one thousand, five hundred sixty-one".