4001530 has 16 divisors (see below), whose sum is σ = 7757064. Its totient is φ = 1477440.

The previous prime is 4001527. The next prime is 4001531. The reversal of 4001530 is 351004.

It can be written as a sum of positive squares in 4 ways, for example, as 1896129 + 2105401 = 1377^2 + 1451^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 4001530.

It is not an unprimeable number, because it can be changed into a prime (4001531) 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, 15261 + ... + 15520.

Almost surely, 2^4001530 is an apocalyptic number.

4001530 is a deficient number, since it is larger than the sum of its proper divisors (3755534).

4001530 is a wasteful number, since it uses less digits than its factorization.

4001530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30801.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 4001530 is about 2000.3824634304. The cubic root of 4001530 is about 158.7603419803.

Adding to 4001530 its reverse (351004), we get a palindrome (4352534).

The spelling of 4001530 in words is "four million, one thousand, five hundred thirty".