4021434 has 16 divisors (see below), whose sum is σ = 8936640. Its totient is φ = 1340460.

The previous prime is 4021427. The next prime is 4021439. The reversal of 4021434 is 4341204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (4021439) 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, 37182 + ... + 37289.

It is an arithmetic number, because the mean of its divisors is an integer number (558540).

Almost surely, 2^4021434 is an apocalyptic number.

4021434 is an abundant number, since it is smaller than the sum of its proper divisors (4915206).

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

4021434 is a wasteful number, since it uses less digits than its factorization.

4021434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74482 (or 74476 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4021434 is about 2005.3513407879. The cubic root of 4021434 is about 159.0231365406.

Adding to 4021434 its reverse (4341204), we get a palindrome (8362638).

The spelling of 4021434 in words is "four million, twenty-one thousand, four hundred thirty-four".