71370225 has 36 divisors (see below), whose sum is σ = 131302236. Its totient is φ = 37031040.

The previous prime is 71370223. The next prime is 71370269. The reversal of 71370225 is 52207317.

71370225 is a `hidden beast` number, since 71 + 370 + 225 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1521 + 71368704 = 39^2 + 8448^2 .

It is not a de Polignac number, because 71370225 - 2¹ = 71370223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71370223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4039 + ... + 12611.

Almost surely, 2^71370225 is an apocalyptic number.

71370225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71370225 is a deficient number, since it is larger than the sum of its proper divisors (59932011).

71370225 is a wasteful number, since it uses less digits than its factorization.

71370225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8626 (or 8618 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 71370225 is about 8448.0900208272. The cubic root of 71370225 is about 414.8002619409.

The spelling of 71370225 in words is "seventy-one million, three hundred seventy thousand, two hundred twenty-five".