71190521 has 4 divisors (see below), whose sum is σ = 72397200. Its totient is φ = 69983844.

The previous prime is 71190463. The next prime is 71190523. The reversal of 71190521 is 12509117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71190521 - 2¹⁰ = 71189497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71190523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603251 + ... + 603368.

It is an arithmetic number, because the mean of its divisors is an integer number (18099300).

Almost surely, 2^71190521 is an apocalyptic number.

It is an amenable number.

71190521 is a deficient number, since it is larger than the sum of its proper divisors (1206679).

71190521 is a wasteful number, since it uses less digits than its factorization.

71190521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206678.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 71190521 is about 8437.4475405777. The cubic root of 71190521 is about 414.4518257094.

Adding to 71190521 its reverse (12509117), we get a palindrome (83699638).

The spelling of 71190521 in words is "seventy-one million, one hundred ninety thousand, five hundred twenty-one".