11251861 has 2 divisors, whose sum is σ = 11251862. Its totient is φ = 11251860.

The previous prime is 11251859. The next prime is 11251871. The reversal of 11251861 is 16815211.

It is a happy number.

11251861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8122500 + 3129361 = 2850^2 + 1769^2 .

It is a cyclic number.

It is not a de Polignac number, because 11251861 - 2¹ = 11251859 is a prime.

Together with 11251859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11251871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5625930 + 5625931.

It is an arithmetic number, because the mean of its divisors is an integer number (5625931).

Almost surely, 2^11251861 is an apocalyptic number.

It is an amenable number.

11251861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11251861 is an equidigital number, since it uses as much as digits as its factorization.

11251861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 25.

The square root of 11251861 is about 3354.3793762781. The cubic root of 11251861 is about 224.0825920455.

The spelling of 11251861 in words is "eleven million, two hundred fifty-one thousand, eight hundred sixty-one".