71545025 has 6 divisors (see below), whose sum is σ = 88715862. Its totient is φ = 57236000.

The previous prime is 71545021. The next prime is 71545049. The reversal of 71545025 is 52054517.

It can be written as a sum of positive squares in 3 ways, for example, as 3713329 + 67831696 = 1927^2 + 8236^2 .

It is not a de Polignac number, because 71545025 - 2² = 71545021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71545021) 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, 1430876 + ... + 1430925.

It is an arithmetic number, because the mean of its divisors is an integer number (14785977).

Almost surely, 2^71545025 is an apocalyptic number.

It is an amenable number.

71545025 is a deficient number, since it is larger than the sum of its proper divisors (17170837).

71545025 is a wasteful number, since it uses less digits than its factorization.

71545025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861811 (or 2861806 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 71545025 is about 8458.4292276994. The cubic root of 71545025 is about 415.1386288692.

The spelling of 71545025 in words is "seventy-one million, five hundred forty-five thousand, twenty-five".