15461861 has 2 divisors, whose sum is σ = 15461862. Its totient is φ = 15461860.

The previous prime is 15461833. The next prime is 15461899. The reversal of 15461861 is 16816451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 5317636 = 3185^2 + 2306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15461861 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15461461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7730930 + 7730931.

It is an arithmetic number, because the mean of its divisors is an integer number (7730931).

Almost surely, 2^15461861 is an apocalyptic number.

It is an amenable number.

15461861 is a deficient number, since it is larger than the sum of its proper divisors (1).

15461861 is an equidigital number, since it uses as much as digits as its factorization.

15461861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 15461861 is about 3932.1572959382. The cubic root of 15461861 is about 249.1268795258.

The spelling of 15461861 in words is "fifteen million, four hundred sixty-one thousand, eight hundred sixty-one".