4012520 has 16 divisors (see below), whose sum is σ = 9028260. Its totient is φ = 1604992.

The previous prime is 4012507. The next prime is 4012537. The reversal of 4012520 is 252104.

It can be written as a sum of positive squares in 2 ways, for example, as 3541924 + 470596 = 1882^2 + 686^2 .

It is a super-2 number, since 2×4012520² = 32200633500800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4012495 and 4012504.

It is an unprimeable number.

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, 50117 + ... + 50196.

Almost surely, 2^4012520 is an apocalyptic number.

4012520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4012520 is an abundant number, since it is smaller than the sum of its proper divisors (5015740).

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

4012520 is a wasteful number, since it uses less digits than its factorization.

4012520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100324 (or 100320 counting only the distinct ones).

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

The square root of 4012520 is about 2003.1275546006. The cubic root of 4012520 is about 158.9055515441.

Adding to 4012520 its reverse (252104), we get a palindrome (4264624).

The spelling of 4012520 in words is "four million, twelve thousand, five hundred twenty".