11626561 has 2 divisors, whose sum is σ = 11626562. Its totient is φ = 11626560.

The previous prime is 11626553. The next prime is 11626567. The reversal of 11626561 is 16562611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 1640961 = 3160^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 11626561 - 2³ = 11626553 is a prime.

It is not a weakly prime, because it can be changed into another prime (11626567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5813280 + 5813281.

It is an arithmetic number, because the mean of its divisors is an integer number (5813281).

Almost surely, 2^11626561 is an apocalyptic number.

It is an amenable number.

11626561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11626561 is an equidigital number, since it uses as much as digits as its factorization.

11626561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 11626561 is about 3409.7743327088. The cubic root of 11626561 is about 226.5428839235.

The spelling of 11626561 in words is "eleven million, six hundred twenty-six thousand, five hundred sixty-one".