7255538 has 4 divisors (see below), whose sum is σ = 10883310. Its totient is φ = 3627768.

The previous prime is 7255529. The next prime is 7255609. The reversal of 7255538 is 8355527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8355527 = 83 ⋅100669.

It can be written as a sum of positive squares in only one way, i.e., 6620329 + 635209 = 2573^2 + 797^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7255498 and 7255507.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1813883 + ... + 1813886.

Almost surely, 2^7255538 is an apocalyptic number.

7255538 is a deficient number, since it is larger than the sum of its proper divisors (3627772).

7255538 is a wasteful number, since it uses less digits than its factorization.

7255538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627771.

The product of its digits is 42000, while the sum is 35.

The square root of 7255538 is about 2693.6105880398. The cubic root of 7255538 is about 193.5930997529.

The spelling of 7255538 in words is "seven million, two hundred fifty-five thousand, five hundred thirty-eight".