9651861 has 6 divisors (see below), whose sum is σ = 13941590. Its totient is φ = 6434568.

The previous prime is 9651839. The next prime is 9651871. The reversal of 9651861 is 1681569.

It can be written as a sum of positive squares in only one way, i.e., 5267025 + 4384836 = 2295^2 + 2094^2 .

It is not a de Polignac number, because 9651861 - 2⁶ = 9651797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9651871) 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 in 5 ways as a sum of consecutive naturals, for example, 536206 + ... + 536223.

Almost surely, 2^9651861 is an apocalyptic number.

It is an amenable number.

9651861 is a deficient number, since it is larger than the sum of its proper divisors (4289729).

9651861 is a wasteful number, since it uses less digits than its factorization.

9651861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072435 (or 1072432 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 9651861 is about 3106.7444375101. The cubic root of 9651861 is about 212.9137387926.

The spelling of 9651861 in words is "nine million, six hundred fifty-one thousand, eight hundred sixty-one".