669249 has 16 divisors (see below), whose sum is σ = 1133440. Its totient is φ = 382320.

The previous prime is 669247. The next prime is 669271. The reversal of 669249 is 942966.

It is not a de Polignac number, because 669249 - 2¹ = 669247 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (669241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1582 + ... + 1959.

It is an arithmetic number, because the mean of its divisors is an integer number (70840).

2⁶⁶⁹²⁴⁹ is an apocalyptic number.

It is an amenable number.

669249 is a deficient number, since it is larger than the sum of its proper divisors (464191).

669249 is a wasteful number, since it uses less digits than its factorization.

669249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557 (or 3551 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 669249 is about 818.0764022999. The cubic root of 669249 is about 87.4706949483.

The spelling of 669249 in words is "six hundred sixty-nine thousand, two hundred forty-nine".