71858225 has 12 divisors (see below), whose sum is σ = 89245404. Its totient is φ = 57395520.

The previous prime is 71858221. The next prime is 71858231. The reversal of 71858225 is 52285817.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 11826721 + 60031504 = 3439^2 + 7748^2 .

It is not a de Polignac number, because 71858225 - 2² = 71858221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71858221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17027 + ... + 20823.

It is an arithmetic number, because the mean of its divisors is an integer number (7437117).

Almost surely, 2^71858225 is an apocalyptic number.

It is an amenable number.

71858225 is a deficient number, since it is larger than the sum of its proper divisors (17387179).

71858225 is a wasteful number, since it uses less digits than its factorization.

71858225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564 (or 4559 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 71858225 is about 8476.9230856485. The cubic root of 71858225 is about 415.7435260355.

The spelling of 71858225 in words is "seventy-one million, eight hundred fifty-eight thousand, two hundred twenty-five".