71534545 has 8 divisors (see below), whose sum is σ = 87935400. Its totient is φ = 55831680.

The previous prime is 71534501. The next prime is 71534549. The reversal of 71534545 is 54543517.

It can be written as a sum of positive squares in 4 ways, for example, as 5973136 + 65561409 = 2444^2 + 8097^2 .

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

It is not a de Polignac number, because 71534545 - 2⁹ = 71534033 is a prime.

It is a super-2 number, since 2×71534545² = 10234382256714050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71534545.

It is not an unprimeable number, because it can be changed into a prime (71534549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174270 + ... + 174679.

It is an arithmetic number, because the mean of its divisors is an integer number (10991925).

Almost surely, 2^71534545 is an apocalyptic number.

It is an amenable number.

71534545 is a deficient number, since it is larger than the sum of its proper divisors (16400855).

71534545 is a wasteful number, since it uses less digits than its factorization.

71534545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348995.

The product of its digits is 42000, while the sum is 34.

The square root of 71534545 is about 8457.8097046458. The cubic root of 71534545 is about 415.1183578800.

The spelling of 71534545 in words is "seventy-one million, five hundred thirty-four thousand, five hundred forty-five".