71240025 has 24 divisors (see below), whose sum is σ = 123985120. Its totient is φ = 35994240.

The previous prime is 71240023. The next prime is 71240041. The reversal of 71240025 is 52004217.

It is not a de Polignac number, because 71240025 - 2¹ = 71240023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71239983 and 71240010.

It is not an unprimeable number, because it can be changed into a prime (71240021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23572 + ... + 26421.

Almost surely, 2^71240025 is an apocalyptic number.

71240025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71240025 is a deficient number, since it is larger than the sum of its proper divisors (52745095).

71240025 is a wasteful number, since it uses less digits than its factorization.

71240025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50025 (or 50020 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 71240025 is about 8440.3806193797. The cubic root of 71240025 is about 414.5478697194.

The spelling of 71240025 in words is "seventy-one million, two hundred forty thousand, twenty-five".