7521612 has 48 divisors (see below), whose sum is σ = 20224512. Its totient is φ = 2131200.

The previous prime is 7521607. The next prime is 7521617. The reversal of 7521612 is 2161257.

It is an interprime number because it is at equal distance from previous prime (7521607) and next prime (7521617).

It is not an unprimeable number, because it can be changed into a prime (7521617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12388 + ... + 12980.

It is an arithmetic number, because the mean of its divisors is an integer number (421344).

Almost surely, 2^7521612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7521612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10112256).

7521612 is an abundant number, since it is smaller than the sum of its proper divisors (12702900).

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

7521612 is a wasteful number, since it uses less digits than its factorization.

7521612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 756 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 7521612 is about 2742.5557423688. Note that the first 3 decimals coincide. The cubic root of 7521612 is about 195.9312197927.

Adding to 7521612 its reverse (2161257), we get a palindrome (9682869).

It can be divided in two parts, 75 and 21612, that multiplied together give a triangular number (1620900 = T₁₈₀₀).

The spelling of 7521612 in words is "seven million, five hundred twenty-one thousand, six hundred twelve".