71047725 has 24 divisors (see below), whose sum is σ = 134247360. Its totient is φ = 32478720.

The previous prime is 71047723. The next prime is 71047727. The reversal of 71047725 is 52774017.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71047723) and next prime (71047727).

It is not a de Polignac number, because 71047725 - 2¹ = 71047723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71047723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67140 + ... + 68189.

It is an arithmetic number, because the mean of its divisors is an integer number (5593640).

Almost surely, 2^71047725 is an apocalyptic number.

71047725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71047725 is a deficient number, since it is larger than the sum of its proper divisors (63199635).

71047725 is a wasteful number, since it uses less digits than its factorization.

71047725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135349 (or 135344 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 71047725 is about 8428.9812551696. The cubic root of 71047725 is about 414.1745337519.

The spelling of 71047725 in words is "seventy-one million, forty-seven thousand, seven hundred twenty-five".