71512801 has 8 divisors (see below), whose sum is σ = 72892904. Its totient is φ = 70139520.

The previous prime is 71512787. The next prime is 71512817. The reversal of 71512801 is 10821517.

It can be written as a sum of positive squares in 4 ways, for example, as 8294400 + 63218401 = 2880^2 + 7951^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71512801 - 2¹¹ = 71510753 is a prime.

It is a super-2 number, since 2×71512801² = 10228161413731202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71512891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22741 + ... + 25693.

It is an arithmetic number, because the mean of its divisors is an integer number (9111613).

Almost surely, 2^71512801 is an apocalyptic number.

It is an amenable number.

71512801 is a deficient number, since it is larger than the sum of its proper divisors (1380103).

71512801 is a wasteful number, since it uses less digits than its factorization.

71512801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 71512801 is about 8456.5241677654. The cubic root of 71512801 is about 415.0762931298.

The spelling of 71512801 in words is "seventy-one million, five hundred twelve thousand, eight hundred one".