1406278 has 4 divisors (see below), whose sum is σ = 2109420. Its totient is φ = 703138.

The previous prime is 1406267. The next prime is 1406281. The reversal of 1406278 is 8726041.

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

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 351568 + ... + 351571.

It is an arithmetic number, because the mean of its divisors is an integer number (527355).

2^1406278 is an apocalyptic number.

1406278 is a deficient number, since it is larger than the sum of its proper divisors (703142).

1406278 is an equidigital number, since it uses as much as digits as its factorization.

1406278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703141.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1406278 is about 1185.8659283410. The cubic root of 1406278 is about 112.0358622402.

The spelling of 1406278 in words is "one million, four hundred six thousand, two hundred seventy-eight".