7522381 has 6 divisors (see below), whose sum is σ = 7991210. Its totient is φ = 7079616.

The previous prime is 7522363. The next prime is 7522387. The reversal of 7522381 is 1832257.

It can be written as a sum of positive squares in 3 ways, for example, as 1121481 + 6400900 = 1059^2 + 2530^2 .

It is not a de Polignac number, because 7522381 - 2⁹ = 7521869 is a prime.

It is a super-2 number, since 2×7522381² = 113172431818322, which contains 22 as substring.

It is a Duffinian number.

7522381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7522387) 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 5 ways as a sum of consecutive naturals, for example, 12726 + ... + 13303.

Almost surely, 2^7522381 is an apocalyptic number.

It is an amenable number.

7522381 is a deficient number, since it is larger than the sum of its proper divisors (468829).

7522381 is a wasteful number, since it uses less digits than its factorization.

7522381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26063 (or 26046 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 7522381 is about 2742.6959364829. The cubic root of 7522381 is about 195.9378968176.

The spelling of 7522381 in words is "seven million, five hundred twenty-two thousand, three hundred eighty-one".