7485381 has 6 divisors (see below), whose sum is σ = 10812230. Its totient is φ = 4990248.

The previous prime is 7485377. The next prime is 7485383. The reversal of 7485381 is 1835847.

It can be written as a sum of positive squares in only one way, i.e., 6081156 + 1404225 = 2466^2 + 1185^2 .

It is not a de Polignac number, because 7485381 - 2² = 7485377 is a prime.

It is a super-2 number, since 2×7485381² = 112061857430322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7485383) 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 5 ways as a sum of consecutive naturals, for example, 415846 + ... + 415863.

Almost surely, 2^7485381 is an apocalyptic number.

It is an amenable number.

7485381 is a deficient number, since it is larger than the sum of its proper divisors (3326849).

7485381 is a wasteful number, since it uses less digits than its factorization.

7485381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831715 (or 831712 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 7485381 is about 2735.9424336049. The cubic root of 7485381 is about 195.6161183350.

The spelling of 7485381 in words is "seven million, four hundred eighty-five thousand, three hundred eighty-one".