8249861 has 4 divisors (see below), whose sum is σ = 8286432. Its totient is φ = 8213292.

The previous prime is 8249837. The next prime is 8249881. The reversal of 8249861 is 1689428.

8249861 is nontrivially palindromic in base 11.

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 not a de Polignac number, because 8249861 - 2⁶ = 8249797 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 (8249881) 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, 17945 + ... + 18398.

It is an arithmetic number, because the mean of its divisors is an integer number (2071608).

Almost surely, 2^8249861 is an apocalyptic number.

It is an amenable number.

8249861 is a deficient number, since it is larger than the sum of its proper divisors (36571).

8249861 is a wasteful number, since it uses less digits than its factorization.

8249861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36570.

The product of its digits is 27648, while the sum is 38.

The square root of 8249861 is about 2872.2571263729. The cubic root of 8249861 is about 202.0608662119.

It can be divided in two parts, 82498 and 61, that multiplied together give a triangular number (5032378 = T₃₁₇₂).

The spelling of 8249861 in words is "eight million, two hundred forty-nine thousand, eight hundred sixty-one".