1906749 has 24 divisors (see below), whose sum is σ = 3043040. Its totient is φ = 1143072.

The previous prime is 1906747. The next prime is 1906757. The reversal of 1906749 is 9476091.

It is not a de Polignac number, because 1906749 - 2¹ = 1906747 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

1906749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4842 + ... + 5220.

2^1906749 is an apocalyptic number.

It is an amenable number.

1906749 is a deficient number, since it is larger than the sum of its proper divisors (1136291).

1906749 is a wasteful number, since it uses less digits than its factorization.

1906749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1906749 is about 1380.8508246730. The cubic root of 1906749 is about 124.0027097916.

The spelling of 1906749 in words is "one million, nine hundred six thousand, seven hundred forty-nine".