4021634 has 8 divisors (see below), whose sum is σ = 6043788. Its totient is φ = 2007040.

The previous prime is 4021627. The next prime is 4021651. The reversal of 4021634 is 4361204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2706025 + 1315609 = 1645^2 + 1147^2 .

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287 + ... + 2850.

Almost surely, 2^4021634 is an apocalyptic number.

4021634 is a deficient number, since it is larger than the sum of its proper divisors (2022154).

4021634 is a wasteful number, since it uses less digits than its factorization.

4021634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4021634 is about 2005.4012067414. The cubic root of 4021634 is about 159.0257727561.

Adding to 4021634 its reverse (4361204), we get a palindrome (8382838).

The spelling of 4021634 in words is "four million, twenty-one thousand, six hundred thirty-four".