7151225 has 6 divisors (see below), whose sum is σ = 8867550. Its totient is φ = 5720960.

The previous prime is 7151219. The next prime is 7151227. The reversal of 7151225 is 5221517.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1893376 + 5257849 = 1376^2 + 2293^2 .

It is not a de Polignac number, because 7151225 - 2¹⁸ = 6889081 is a prime.

It is a super-2 number, since 2×7151225² = 102280038001250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7151225.

It is not an unprimeable number, because it can be changed into a prime (7151227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143000 + ... + 143049.

It is an arithmetic number, because the mean of its divisors is an integer number (1477925).

Almost surely, 2^7151225 is an apocalyptic number.

It is an amenable number.

7151225 is a deficient number, since it is larger than the sum of its proper divisors (1716325).

7151225 is a wasteful number, since it uses less digits than its factorization.

7151225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286059 (or 286054 counting only the distinct ones).

The product of its digits is 700, while the sum is 23.

The square root of 7151225 is about 2674.1774436264. The cubic root of 7151225 is about 192.6608539146.

The spelling of 7151225 in words is "seven million, one hundred fifty-one thousand, two hundred twenty-five".