1966542 has 8 divisors (see below), whose sum is σ = 3933096. Its totient is φ = 655512.

The previous prime is 1966511. The next prime is 1966561. The reversal of 1966542 is 2456691.

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

1966542 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163873 + ... + 163884.

It is an arithmetic number, because the mean of its divisors is an integer number (491637).

2^1966542 is an apocalyptic number.

1966542 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.

1966542 is a wasteful number, since it uses less digits than its factorization.

1966542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327762.

The product of its digits is 12960, while the sum is 33.

The square root of 1966542 is about 1402.3344822117. The cubic root of 1966542 is about 125.2855764054.

The spelling of 1966542 in words is "one million, nine hundred sixty-six thousand, five hundred forty-two".