71438525 has 6 divisors (see below), whose sum is σ = 88583802. Its totient is φ = 57150800.

The previous prime is 71438429. The next prime is 71438531. The reversal of 71438525 is 52583417.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11546404 + 59892121 = 3398^2 + 7739^2 .

It is not a de Polignac number, because 71438525 - 2¹⁸ = 71176381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1428746 + ... + 1428795.

It is an arithmetic number, because the mean of its divisors is an integer number (14763967).

Almost surely, 2^71438525 is an apocalyptic number.

It is an amenable number.

71438525 is a deficient number, since it is larger than the sum of its proper divisors (17145277).

71438525 is a wasteful number, since it uses less digits than its factorization.

71438525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857551 (or 2857546 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 71438525 is about 8452.1313879991. The cubic root of 71438525 is about 414.9325385092.

The spelling of 71438525 in words is "seventy-one million, four hundred thirty-eight thousand, five hundred twenty-five".