1406656 has 28 divisors (see below), whose sum is σ = 2885440. Its totient is φ = 679680.

The previous prime is 1406651. The next prime is 1406677. The reversal of 1406656 is 6566041.

1406656 is nontrivially palindromic in base 15.

It is a super-2 number, since 2×1406656² = 3957362204672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1406651) 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, 1630 + ... + 2338.

2^1406656 is an apocalyptic number.

1406656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1406656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1442720).

1406656 is an abundant number, since it is smaller than the sum of its proper divisors (1478784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1406656 is an equidigital number, since it uses as much as digits as its factorization.

1406656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1406656 is about 1186.0252948399. The cubic root of 1406656 is about 112.0458995543.

The spelling of 1406656 in words is "one million, four hundred six thousand, six hundred fifty-six".