71506425 has 24 divisors (see below), whose sum is σ = 123367104. Its totient is φ = 36477760.

The previous prime is 71506417. The next prime is 71506433. The reversal of 71506425 is 52460517.

It is an interprime number because it is at equal distance from previous prime (71506417) and next prime (71506433).

It is not a de Polignac number, because 71506425 - 2³ = 71506417 is a prime.

It is a super-2 number, since 2×71506425² = 10226337632561250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71506392 and 71506401.

It is an unprimeable number.

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, 19002 + ... + 22451.

It is an arithmetic number, because the mean of its divisors is an integer number (5140296).

Almost surely, 2^71506425 is an apocalyptic number.

71506425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71506425 is a deficient number, since it is larger than the sum of its proper divisors (51860679).

71506425 is a wasteful number, since it uses less digits than its factorization.

71506425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41489 (or 41484 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 71506425 is about 8456.1471723238. The cubic root of 71506425 is about 415.0639568531.

The spelling of 71506425 in words is "seventy-one million, five hundred six thousand, four hundred twenty-five".