4020972 has 12 divisors (see below), whose sum is σ = 9382296. Its totient is φ = 1340320.

The previous prime is 4020949. The next prime is 4020977. The reversal of 4020972 is 2790204.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (4020977) 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, 167529 + ... + 167552.

It is an arithmetic number, because the mean of its divisors is an integer number (781858).

Almost surely, 2^4020972 is an apocalyptic number.

It is an amenable number.

4020972 is an abundant number, since it is smaller than the sum of its proper divisors (5361324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4020972 is a wasteful number, since it uses less digits than its factorization.

4020972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335088 (or 335086 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 4020972 is about 2005.2361456946. The cubic root of 4020972 is about 159.0170465486.

It can be divided in two parts, 40 and 20972, that added together give a palindrome (21012).

The spelling of 4020972 in words is "four million, twenty thousand, nine hundred seventy-two".