1949857 has 12 divisors (see below), whose sum is σ = 2443476. Its totient is φ = 1542240.

The previous prime is 1949839. The next prime is 1949881. The reversal of 1949857 is 7589491.

It can be written as a sum of positive squares in 2 ways, for example, as 1147041 + 802816 = 1071^2 + 896^2 .

It is not a de Polignac number, because 1949857 - 2¹⁵ = 1917089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1949887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 894 + ... + 2167.

It is an arithmetic number, because the mean of its divisors is an integer number (203623).

2^1949857 is an apocalyptic number.

It is an amenable number.

1949857 is a deficient number, since it is larger than the sum of its proper divisors (493619).

1949857 is a wasteful number, since it uses less digits than its factorization.

1949857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088 (or 3081 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 1949857 is about 1396.3728012247. The cubic root of 1949857 is about 124.9302437464.

The spelling of 1949857 in words is "one million, nine hundred forty-nine thousand, eight hundred fifty-seven".