9998261 has 32 divisors (see below), whose sum is σ = 13644288. Its totient is φ = 7096320.

The previous prime is 9998249. The next prime is 9998273. The reversal of 9998261 is 1628999.

It is an interprime number because it is at equal distance from previous prime (9998249) and next prime (9998273).

It is not a de Polignac number, because 9998261 - 2¹⁰ = 9997237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35441 + ... + 35721.

It is an arithmetic number, because the mean of its divisors is an integer number (426384).

Almost surely, 2^9998261 is an apocalyptic number.

9998261 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9998261 is a deficient number, since it is larger than the sum of its proper divisors (3646027).

9998261 is a wasteful number, since it uses less digits than its factorization.

9998261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its digits is 69984, while the sum is 44.

The square root of 9998261 is about 3162.0026881709. The cubic root of 9998261 is about 215.4309797394.

The spelling of 9998261 in words is "nine million, nine hundred ninety-eight thousand, two hundred sixty-one".