1971242 has 16 divisors (see below), whose sum is σ = 3639552. Its totient is φ = 779760.

The previous prime is 1971241. The next prime is 1971251. The reversal of 1971242 is 2421791.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (1971241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5234 + ... + 5597.

It is an arithmetic number, because the mean of its divisors is an integer number (227472).

2^1971242 is an apocalyptic number.

1971242 is a deficient number, since it is larger than the sum of its proper divisors (1668310).

1971242 is a wasteful number, since it uses less digits than its factorization.

1971242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10853.

The product of its digits is 1008, while the sum is 26.

The square root of 1971242 is about 1404.0092592287. The cubic root of 1971242 is about 125.3853070873.

Subtracting from 1971242 its sum of digits (26), we obtain a square (1971216 = 1404²).

The spelling of 1971242 in words is "one million, nine hundred seventy-one thousand, two hundred forty-two".