1660842 has 12 divisors (see below), whose sum is σ = 3598530. Its totient is φ = 553608.

The previous prime is 1660837. The next prime is 1660843. The reversal of 1660842 is 2480661.

1660842 is a `hidden beast` number, since 16 + 608 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1640961 + 19881 = 1281^2 + 141^2 .

It is a super-2 number, since 2×1660842² = 5516792297928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1660843) 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, 46117 + ... + 46152.

2^1660842 is an apocalyptic number.

1660842 is an abundant number, since it is smaller than the sum of its proper divisors (1937688).

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

1660842 is a wasteful number, since it uses less digits than its factorization.

1660842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92277 (or 92274 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1660842 is about 1288.7365906189. The cubic root of 1660842 is about 118.4248308190.

The spelling of 1660842 in words is "one million, six hundred sixty thousand, eight hundred forty-two".