9961261 has 4 divisors (see below), whose sum is σ = 10282624. Its totient is φ = 9639900.

The previous prime is 9961249. The next prime is 9961267. The reversal of 9961261 is 1621699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9961261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9961267) 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 in 3 ways as a sum of consecutive naturals, for example, 160635 + ... + 160696.

It is an arithmetic number, because the mean of its divisors is an integer number (2570656).

Almost surely, 2^9961261 is an apocalyptic number.

It is an amenable number.

9961261 is a deficient number, since it is larger than the sum of its proper divisors (321363).

9961261 is a wasteful number, since it uses less digits than its factorization.

9961261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321362.

The product of its digits is 5832, while the sum is 34.

The square root of 9961261 is about 3156.1465428589. The cubic root of 9961261 is about 215.1649068341.

The spelling of 9961261 in words is "nine million, nine hundred sixty-one thousand, two hundred sixty-one".