1971442 has 8 divisors (see below), whose sum is σ = 3226032. Its totient is φ = 896100.

The previous prime is 1971433. The next prime is 1971443. The reversal of 1971442 is 2441791.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1971442.

It is not an unprimeable number, because it can be changed into a prime (1971443) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 44784 + ... + 44827.

It is an arithmetic number, because the mean of its divisors is an integer number (403254).

2^1971442 is an apocalyptic number.

1971442 is a deficient number, since it is larger than the sum of its proper divisors (1254590).

1971442 is a wasteful number, since it uses less digits than its factorization.

1971442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89624.

The product of its digits is 2016, while the sum is 28.

The square root of 1971442 is about 1404.0804820237. The cubic root of 1971442 is about 125.3895474280.

The spelling of 1971442 in words is "one million, nine hundred seventy-one thousand, four hundred forty-two".