1405561 has 2 divisors, whose sum is σ = 1405562. Its totient is φ = 1405560.

The previous prime is 1405531. The next prime is 1405583. The reversal of 1405561 is 1655041.

It is an a-pointer prime, because the next prime (1405583) can be obtained adding 1405561 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123600 + 281961 = 1060^2 + 531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405561 - 2⁵ = 1405529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1405511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702780 + 702781.

It is an arithmetic number, because the mean of its divisors is an integer number (702781).

2^1405561 is an apocalyptic number.

It is an amenable number.

1405561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405561 is an equidigital number, since it uses as much as digits as its factorization.

1405561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1405561 is about 1185.5635790627. The cubic root of 1405561 is about 112.0168182652.

The spelling of 1405561 in words is "one million, four hundred five thousand, five hundred sixty-one".