71370561 has 8 divisors (see below), whose sum is σ = 95855904. Its totient is φ = 47232800.

The previous prime is 71370557. The next prime is 71370569. The reversal of 71370561 is 16507317.

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 71370561 - 2² = 71370557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71370569) 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, 86415 + ... + 87236.

It is an arithmetic number, because the mean of its divisors is an integer number (11981988).

Almost surely, 2^71370561 is an apocalyptic number.

It is an amenable number.

71370561 is a deficient number, since it is larger than the sum of its proper divisors (24485343).

71370561 is a wasteful number, since it uses less digits than its factorization.

71370561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173791.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 71370561 is about 8448.1099069555. The cubic root of 71370561 is about 414.8009128784.

Adding to 71370561 its reverse (16507317), we get a palindrome (87877878).

The spelling of 71370561 in words is "seventy-one million, three hundred seventy thousand, five hundred sixty-one".