1971622 has 8 divisors (see below), whose sum is σ = 2988216. Its totient is φ = 975552.

The previous prime is 1971601. The next prime is 1971637. The reversal of 1971622 is 2261791.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 4888 + ... + 5275.

It is an arithmetic number, because the mean of its divisors is an integer number (373527).

2^1971622 is an apocalyptic number.

1971622 is a deficient number, since it is larger than the sum of its proper divisors (1016594).

1971622 is a wasteful number, since it uses less digits than its factorization.

1971622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10262.

The product of its digits is 1512, while the sum is 28.

The square root of 1971622 is about 1404.1445794504. The cubic root of 1971622 is about 125.3933634895.

The spelling of 1971622 in words is "one million, nine hundred seventy-one thousand, six hundred twenty-two".