1656261 has 8 divisors (see below), whose sum is σ = 2453760. Its totient is φ = 1104156.

The previous prime is 1656257. The next prime is 1656283. The reversal of 1656261 is 1626561.

It is a happy number.

1656261 is a `hidden beast` number, since 1 + 656 + 2 + 6 + 1 = 666.

It is not a de Polignac number, because 1656261 - 2² = 1656257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 61343 = 1656261 / (1 + 6 + 5 + 6 + 2 + 6 + 1).

1656261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30645 + ... + 30698.

It is an arithmetic number, because the mean of its divisors is an integer number (306720).

2^1656261 is an apocalyptic number.

It is an amenable number.

1656261 is a deficient number, since it is larger than the sum of its proper divisors (797499).

1656261 is an equidigital number, since it uses as much as digits as its factorization.

1656261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61352 (or 61346 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1656261 is about 1286.9580412741. The cubic root of 1656261 is about 118.3158492099.

The spelling of 1656261 in words is "one million, six hundred fifty-six thousand, two hundred sixty-one".