7111225 has 24 divisors (see below), whose sum is σ = 10133280. Its totient is φ = 4896000.

The previous prime is 7111213. The next prime is 7111243. The reversal of 7111225 is 5221117.

7111225 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 7111225 - 2⁵ = 7111193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

7111225 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4545 + ... + 5905.

It is an arithmetic number, because the mean of its divisors is an integer number (422220).

Almost surely, 2^7111225 is an apocalyptic number.

It is an amenable number.

7111225 is a deficient number, since it is larger than the sum of its proper divisors (3022055).

7111225 is a wasteful number, since it uses less digits than its factorization.

7111225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401 (or 1396 counting only the distinct ones).

The product of its digits is 140, while the sum is 19.

The square root of 7111225 is about 2666.6880207478. The cubic root of 7111225 is about 192.3009693034.

It can be divided in two parts, 711 and 1225, that added together give a square (1936 = 44²).

The spelling of 7111225 in words is "seven million, one hundred eleven thousand, two hundred twenty-five".