1662156 has 18 divisors (see below), whose sum is σ = 4201652. Its totient is φ = 554040.

The previous prime is 1662149. The next prime is 1662161. The reversal of 1662156 is 6512661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is an Ulam 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 in 5 ways as a sum of consecutive naturals, for example, 23050 + ... + 23121.

2^1662156 is an apocalyptic number.

It is an amenable number.

1662156 is an abundant number, since it is smaller than the sum of its proper divisors (2539496).

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

1662156 is a wasteful number, since it uses less digits than its factorization.

1662156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46181 (or 46176 counting only the distinct ones).

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

The square root of 1662156 is about 1289.2462914432. The cubic root of 1662156 is about 118.4560537786.

The spelling of 1662156 in words is "one million, six hundred sixty-two thousand, one hundred fifty-six".