8399261 has 8 divisors (see below), whose sum is σ = 9136344. Its totient is φ = 7675200.

The previous prime is 8399257. The next prime is 8399263. The reversal of 8399261 is 1629938.

It can be written as a sum of positive squares in 4 ways, for example, as 168100 + 8231161 = 410^2 + 2869^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8399261 - 2² = 8399257 is a prime.

It is a super-2 number, since 2×8399261² = 141095170692242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8399263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1886 + ... + 4511.

It is an arithmetic number, because the mean of its divisors is an integer number (1142043).

Almost surely, 2^8399261 is an apocalyptic number.

It is an amenable number.

8399261 is a deficient number, since it is larger than the sum of its proper divisors (737083).

8399261 is a wasteful number, since it uses less digits than its factorization.

8399261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6511.

The product of its digits is 23328, while the sum is 38.

The square root of 8399261 is about 2898.1478568217. The cubic root of 8399261 is about 203.2733099428.

The spelling of 8399261 in words is "eight million, three hundred ninety-nine thousand, two hundred sixty-one".