1656011 has 4 divisors (see below), whose sum is σ = 1892592. Its totient is φ = 1419432.

The previous prime is 1656007. The next prime is 1656013. The reversal of 1656011 is 1106561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1106561 = 607 ⋅1823.

It is not a de Polignac number, because 1656011 - 2² = 1656007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1656013) 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, 118280 + ... + 118293.

It is an arithmetic number, because the mean of its divisors is an integer number (473148).

2^1656011 is an apocalyptic number.

1656011 is a deficient number, since it is larger than the sum of its proper divisors (236581).

1656011 is an equidigital number, since it uses as much as digits as its factorization.

1656011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236580.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1656011 is about 1286.8609093449. The cubic root of 1656011 is about 118.3098959512.

The spelling of 1656011 in words is "one million, six hundred fifty-six thousand, eleven".