4020634 has 4 divisors (see below), whose sum is σ = 6030954. Its totient is φ = 2010316.

The previous prime is 4020631. The next prime is 4020637. The reversal of 4020634 is 4360204.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4020631) and next prime (4020637).

It can be written as a sum of positive squares in only one way, i.e., 2732409 + 1288225 = 1653^2 + 1135^2 .

It is not an unprimeable number, because it can be changed into a prime (4020631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005157 + ... + 1005160.

Almost surely, 2^4020634 is an apocalyptic number.

4020634 is a deficient number, since it is larger than the sum of its proper divisors (2010320).

4020634 is a wasteful number, since it uses less digits than its factorization.

4020634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010319.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 4020634 is about 2005.1518645729. The cubic root of 4020634 is about 159.0125908044.

Adding to 4020634 its reverse (4360204), we get a palindrome (8380838).

The spelling of 4020634 in words is "four million, twenty thousand, six hundred thirty-four".