1906249 has 4 divisors (see below), whose sum is σ = 1932436. Its totient is φ = 1880064.

The previous prime is 1906243. The next prime is 1906259. The reversal of 1906249 is 9426091.

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 1140624 + 765625 = 1068^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1906249 - 2³ = 1906241 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 1906249.

It is not an unprimeable number, because it can be changed into a prime (1906241) 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, 12984 + ... + 13129.

It is an arithmetic number, because the mean of its divisors is an integer number (483109).

2^1906249 is an apocalyptic number.

It is an amenable number.

1906249 is a deficient number, since it is larger than the sum of its proper divisors (26187).

1906249 is an equidigital number, since it uses as much as digits as its factorization.

1906249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26186.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1906249 is about 1380.6697650054. The cubic root of 1906249 is about 123.9918699144.

The spelling of 1906249 in words is "one million, nine hundred six thousand, two hundred forty-nine".