1816249 has 4 divisors (see below), whose sum is σ = 1832436. Its totient is φ = 1800064.

The previous prime is 1816247. The next prime is 1816253. The reversal of 1816249 is 9426181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144400 + 1671849 = 380^2 + 1293^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816249 - 2¹ = 1816247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1816249.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816247) 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, 7924 + ... + 8149.

It is an arithmetic number, because the mean of its divisors is an integer number (458109).

2^1816249 is an apocalyptic number.

It is an amenable number.

1816249 is a deficient number, since it is larger than the sum of its proper divisors (16187).

1816249 is a wasteful number, since it uses less digits than its factorization.

1816249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16186.

The product of its digits is 3456, while the sum is 31.

The square root of 1816249 is about 1347.6828261872. The cubic root of 1816249 is about 122.0089798998.

The spelling of 1816249 in words is "one million, eight hundred sixteen thousand, two hundred forty-nine".