1661442 has 8 divisors (see below), whose sum is σ = 3322896. Its totient is φ = 553812.

The previous prime is 1661441. The next prime is 1661447. The reversal of 1661442 is 2441661.

It is a sphenic number, since it is the product of 3 distinct primes.

1661442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1661441) 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, 138448 + ... + 138459.

It is an arithmetic number, because the mean of its divisors is an integer number (415362).

2^1661442 is an apocalyptic number.

1661442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1661442 is a wasteful number, since it uses less digits than its factorization.

1661442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276912.

The product of its digits is 1152, while the sum is 24.

The square root of 1661442 is about 1288.9693557257. The cubic root of 1661442 is about 118.4390899205.

The spelling of 1661442 in words is "one million, six hundred sixty-one thousand, four hundred forty-two".