8431261 has 4 divisors (see below), whose sum is σ = 8439552. Its totient is φ = 8422972.

The previous prime is 8431243. The next prime is 8431289. The reversal of 8431261 is 1621348.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8431261 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 (8431211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2365 + ... + 4738.

It is an arithmetic number, because the mean of its divisors is an integer number (2109888).

Almost surely, 2^8431261 is an apocalyptic number.

It is an amenable number.

8431261 is a deficient number, since it is larger than the sum of its proper divisors (8291).

8431261 is a wasteful number, since it uses less digits than its factorization.

8431261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8290.

The product of its digits is 1152, while the sum is 25.

The square root of 8431261 is about 2903.6633758065. The cubic root of 8431261 is about 203.5311303486.

The spelling of 8431261 in words is "eight million, four hundred thirty-one thousand, two hundred sixty-one".