1656147 has 6 divisors (see below), whose sum is σ = 2211172. Its totient is φ = 1102612.

The previous prime is 1656131. The next prime is 1656163. The reversal of 1656147 is 7416561.

It is an interprime number because it is at equal distance from previous prime (1656131) and next prime (1656163).

It is not a de Polignac number, because 1656147 - 2⁴ = 1656131 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1656107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1858 + ... + 2600.

2^1656147 is an apocalyptic number.

1656147 is a deficient number, since it is larger than the sum of its proper divisors (555025).

1656147 is an frugal number, since it uses more digits than its factorization.

1656147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 746 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 1656147 is about 1286.9137500237. The cubic root of 1656147 is about 118.3131345982.

The spelling of 1656147 in words is "one million, six hundred fifty-six thousand, one hundred forty-seven".