1942681 has 8 divisors (see below), whose sum is σ = 2164680. Its totient is φ = 1731072.

The previous prime is 1942669. The next prime is 1942723. The reversal of 1942681 is 1862491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 144400 + 1798281 = 380^2 + 1341^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1942681 - 2⁹ = 1942169 is a prime.

It is a super-2 number, since 2×1942681² = 7548018935522, which contains 22 as substring.

It is a Duffinian number.

1942681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1942081) 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 7 ways as a sum of consecutive naturals, for example, 2200 + ... + 2953.

It is an arithmetic number, because the mean of its divisors is an integer number (270585).

2^1942681 is an apocalyptic number.

It is an amenable number.

1942681 is a deficient number, since it is larger than the sum of its proper divisors (221999).

1942681 is a wasteful number, since it uses less digits than its factorization.

1942681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5195.

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

The square root of 1942681 is about 1393.8009183524. The cubic root of 1942681 is about 124.7767963449.

The spelling of 1942681 in words is "one million, nine hundred forty-two thousand, six hundred eighty-one".