4001522 has 8 divisors (see below), whose sum is σ = 6859776. Its totient is φ = 1714932.

The previous prime is 4001521. The next prime is 4001527. The reversal of 4001522 is 2251004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 285823 = 4001522 / (4 + 0 + 0 + 1 + 5 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 4001497 and 4001506.

It is not an unprimeable number, because it can be changed into a prime (4001521) 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 in 3 ways as a sum of consecutive naturals, for example, 142898 + ... + 142925.

It is an arithmetic number, because the mean of its divisors is an integer number (857472).

Almost surely, 2^4001522 is an apocalyptic number.

4001522 is a deficient number, since it is larger than the sum of its proper divisors (2858254).

4001522 is a wasteful number, since it uses less digits than its factorization.

4001522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285832.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 4001522 is about 2000.3804638118. The cubic root of 4001522 is about 158.7602361804.

Adding to 4001522 its reverse (2251004), we get a palindrome (6252526).

The spelling of 4001522 in words is "four million, one thousand, five hundred twenty-two".