1420561 has 2 divisors, whose sum is σ = 1420562. Its totient is φ = 1420560.

The previous prime is 1420519. The next prime is 1420577. The reversal of 1420561 is 1650241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1089936 + 330625 = 1044^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420561 - 2¹¹ = 1418513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1420501) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710280 + 710281.

It is an arithmetic number, because the mean of its divisors is an integer number (710281).

2^1420561 is an apocalyptic number.

It is an amenable number.

1420561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420561 is an equidigital number, since it uses as much as digits as its factorization.

1420561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1420561 is about 1191.8728959079. The cubic root of 1420561 is about 112.4138863641.

The spelling of 1420561 in words is "one million, four hundred twenty thousand, five hundred sixty-one".