1406401 has 4 divisors (see below), whose sum is σ = 1439152. Its totient is φ = 1373652.

The previous prime is 1406389. The next prime is 1406417. The reversal of 1406401 is 1046041.

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: 1046041 = 113 ⋅9257.

It is a cyclic number.

It is not a de Polignac number, because 1406401 - 2¹³ = 1398209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406441) 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, 16311 + ... + 16396.

It is an arithmetic number, because the mean of its divisors is an integer number (359788).

2^1406401 is an apocalyptic number.

It is an amenable number.

1406401 is a deficient number, since it is larger than the sum of its proper divisors (32751).

1406401 is an equidigital number, since it uses as much as digits as its factorization.

1406401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32750.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1406401 is about 1185.9177880443. The cubic root of 1406401 is about 112.0391285478.

The spelling of 1406401 in words is "one million, four hundred six thousand, four hundred one".