7525381 has 2 divisors, whose sum is σ = 7525382. Its totient is φ = 7525380.

The previous prime is 7525369. The next prime is 7525403. The reversal of 7525381 is 1835257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7474756 + 50625 = 2734^2 + 225^2 .

It is an emirp because it is prime and its reverse (1835257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7525381 - 2¹³ = 7517189 is a prime.

It is a super-2 number, since 2×7525381² = 113262718390322, which contains 22 as substring.

7525381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7525081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3762690 + 3762691.

It is an arithmetic number, because the mean of its divisors is an integer number (3762691).

Almost surely, 2^7525381 is an apocalyptic number.

It is an amenable number.

7525381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7525381 is an equidigital number, since it uses as much as digits as its factorization.

7525381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 31.

The square root of 7525381 is about 2743.2427891093. The cubic root of 7525381 is about 195.9639406800.

The spelling of 7525381 in words is "seven million, five hundred twenty-five thousand, three hundred eighty-one".