1392401 has 4 divisors (see below), whose sum is σ = 1426404. Its totient is φ = 1358400.

The previous prime is 1392379. The next prime is 1392407. The reversal of 1392401 is 1042931.

It is a Cunningham number, because it is equal to 1180²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67600 + 1324801 = 260^2 + 1151^2 .

It is a cyclic number.

It is not a de Polignac number, because 1392401 - 2¹⁴ = 1376017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1392407) 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 3 ways as a sum of consecutive naturals, for example, 16940 + ... + 17021.

It is an arithmetic number, because the mean of its divisors is an integer number (356601).

2^1392401 is an apocalyptic number.

It is an amenable number.

1392401 is a deficient number, since it is larger than the sum of its proper divisors (34003).

1392401 is an equidigital number, since it uses as much as digits as its factorization.

1392401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34002.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1392401 is about 1180.0004237287. Note that the first 3 decimals coincide. The cubic root of 1392401 is about 111.6661241032. Note that the first 3 decimals are identical.

The spelling of 1392401 in words is "one million, three hundred ninety-two thousand, four hundred one".