1970221 has 4 divisors (see below), whose sum is σ = 2149344. Its totient is φ = 1791100.

The previous prime is 1970219. The next prime is 1970233. The reversal of 1970221 is 1220791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1970221 - 2¹ = 1970219 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1970192 and 1970201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1970201) 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, 89545 + ... + 89566.

It is an arithmetic number, because the mean of its divisors is an integer number (537336).

2^1970221 is an apocalyptic number.

1970221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1970221 is a deficient number, since it is larger than the sum of its proper divisors (179123).

1970221 is a wasteful number, since it uses less digits than its factorization.

1970221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179122.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1970221 is about 1403.6456105442. The cubic root of 1970221 is about 125.3636556771.

The spelling of 1970221 in words is "one million, nine hundred seventy thousand, two hundred twenty-one".