1246561 has 2 divisors, whose sum is σ = 1246562. Its totient is φ = 1246560.

The previous prime is 1246543. The next prime is 1246573. The reversal of 1246561 is 1656421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 295936 = 975^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246561 - 2⁵ = 1246529 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1246501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623280 + 623281.

It is an arithmetic number, because the mean of its divisors is an integer number (623281).

2^1246561 is an apocalyptic number.

It is an amenable number.

1246561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246561 is an equidigital number, since it uses as much as digits as its factorization.

1246561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 1246561 is about 1116.4949619233. The cubic root of 1246561 is about 107.6228557557.

The spelling of 1246561 in words is "one million, two hundred forty-six thousand, five hundred sixty-one".