961861 has 2 divisors, whose sum is σ = 961862. Its totient is φ = 961860.

The previous prime is 961853. The next prime is 961871. The reversal of 961861 is 168169.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 11236 = 975^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 961861 - 2³ = 961853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480930 + 480931.

It is an arithmetic number, because the mean of its divisors is an integer number (480931).

2⁹⁶¹⁸⁶¹ is an apocalyptic number.

It is an amenable number.

961861 is a deficient number, since it is larger than the sum of its proper divisors (1).

961861 is an equidigital number, since it uses as much as digits as its factorization.

961861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 961861 is about 980.7451248923. The cubic root of 961861 is about 98.7121865584.

The spelling of 961861 in words is "nine hundred sixty-one thousand, eight hundred sixty-one".