4021970 has 8 divisors (see below), whose sum is σ = 7239564. Its totient is φ = 1608784.

The previous prime is 4021967. The next prime is 4021973. The reversal of 4021970 is 791204.

It is an interprime number because it is at equal distance from previous prime (4021967) and next prime (4021973).

It can be written as a sum of positive squares in 2 ways, for example, as 3869089 + 152881 = 1967^2 + 391^2 .

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

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4021973) 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, 201089 + ... + 201108.

Almost surely, 2^4021970 is an apocalyptic number.

4021970 is a deficient number, since it is larger than the sum of its proper divisors (3217594).

4021970 is a wasteful number, since it uses less digits than its factorization.

4021970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402204.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 4021970 is about 2005.4849787520. The cubic root of 4021970 is about 159.0302014014.

The spelling of 4021970 in words is "four million, twenty-one thousand, nine hundred seventy".