8427249 has 6 divisors (see below), whose sum is σ = 12172706. Its totient is φ = 5618160.

The previous prime is 8427247. The next prime is 8427271. The reversal of 8427249 is 9427248.

It can be written as a sum of positive squares in only one way, i.e., 8208225 + 219024 = 2865^2 + 468^2 .

It is not a de Polignac number, because 8427249 - 2¹ = 8427247 is a prime.

It is a Duffinian number.

8427249 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8427247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 468172 + ... + 468189.

Almost surely, 2^8427249 is an apocalyptic number.

It is an amenable number.

8427249 is a deficient number, since it is larger than the sum of its proper divisors (3745457).

8427249 is a wasteful number, since it uses less digits than its factorization.

8427249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936367 (or 936364 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 8427249 is about 2902.9724421703. The cubic root of 8427249 is about 203.4988419222.

Subtracting 8427249 from its reverse (9427248), we obtain a palindrome (999999).

It can be divided in two parts, 842724 and 9, that multiplied together give a square (7584516 = 2754²).

The spelling of 8427249 in words is "eight million, four hundred twenty-seven thousand, two hundred forty-nine".