1406386 has 4 divisors (see below), whose sum is σ = 2109582. Its totient is φ = 703192.

The previous prime is 1406357. The next prime is 1406387. The reversal of 1406386 is 6836041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6836041 = 521 ⋅13121.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 72361 = 1155^2 + 269^2 .

It is not an unprimeable number, because it can be changed into a prime (1406387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351595 + ... + 351598.

2^1406386 is an apocalyptic number.

1406386 is a deficient number, since it is larger than the sum of its proper divisors (703196).

1406386 is an equidigital number, since it uses as much as digits as its factorization.

1406386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703195.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1406386 is about 1185.9114638117. The cubic root of 1406386 is about 112.0387302278.

The spelling of 1406386 in words is "one million, four hundred six thousand, three hundred eighty-six".