1392841 has 4 divisors (see below), whose sum is σ = 1440900. Its totient is φ = 1344784.

The previous prime is 1392829. The next prime is 1392847. The reversal of 1392841 is 1482931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1482931 = 19 ⋅78049.

It can be written as a sum of positive squares in 2 ways, for example, as 705600 + 687241 = 840^2 + 829^2 .

It is a cyclic number.

It is not a de Polignac number, because 1392841 - 2¹⁷ = 1261769 is a prime.

It is a Duffinian number.

1392841 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1392847) 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, 23986 + ... + 24043.

It is an arithmetic number, because the mean of its divisors is an integer number (360225).

2^1392841 is an apocalyptic number.

It is an amenable number.

1392841 is a deficient number, since it is larger than the sum of its proper divisors (48059).

1392841 is an equidigital number, since it uses as much as digits as its factorization.

1392841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48058.

The product of its digits is 1728, while the sum is 28.

The square root of 1392841 is about 1180.1868496132. The cubic root of 1392841 is about 111.6778850639.

The spelling of 1392841 in words is "one million, three hundred ninety-two thousand, eight hundred forty-one".