1940857 has 4 divisors (see below), whose sum is σ = 1954960. Its totient is φ = 1926756.

The previous prime is 1940849. The next prime is 1940881. The reversal of 1940857 is 7580491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7580491 = 103 ⋅73597.

It is a cyclic number.

It is not a de Polignac number, because 1940857 - 2³ = 1940849 is a prime.

It is a Duffinian number.

1940857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1940557) 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, 6843 + ... + 7120.

It is an arithmetic number, because the mean of its divisors is an integer number (488740).

2^1940857 is an apocalyptic number.

It is an amenable number.

1940857 is a deficient number, since it is larger than the sum of its proper divisors (14103).

1940857 is a wasteful number, since it uses less digits than its factorization.

1940857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14102.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1940857 is about 1393.1464388211. The cubic root of 1940857 is about 124.7377327788.

The spelling of 1940857 in words is "one million, nine hundred forty thousand, eight hundred fifty-seven".