1406813 has 4 divisors (see below), whose sum is σ = 1409340. Its totient is φ = 1404288.

The previous prime is 1406807. The next prime is 1406827. The reversal of 1406813 is 3186041.

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 1138489 + 268324 = 1067^2 + 518^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406813 - 2⁸ = 1406557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406803) 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, 20 + ... + 1677.

It is an arithmetic number, because the mean of its divisors is an integer number (352335).

2^1406813 is an apocalyptic number.

It is an amenable number.

1406813 is a deficient number, since it is larger than the sum of its proper divisors (2527).

1406813 is an equidigital number, since it uses as much as digits as its factorization.

1406813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1406813 is about 1186.0914804517. The cubic root of 1406813 is about 112.0500679632.

The spelling of 1406813 in words is "one million, four hundred six thousand, eight hundred thirteen".