71525121 has 4 divisors (see below), whose sum is σ = 95366832. Its totient is φ = 47683412.

The previous prime is 71525119. The next prime is 71525131. The reversal of 71525121 is 12152517.

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 71525121 - 2¹ = 71525119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71525091 and 71525100.

It is not an unprimeable number, because it can be changed into a prime (71525131) 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, 11920851 + ... + 11920856.

It is an arithmetic number, because the mean of its divisors is an integer number (23841708).

Almost surely, 2^71525121 is an apocalyptic number.

It is an amenable number.

71525121 is a deficient number, since it is larger than the sum of its proper divisors (23841711).

71525121 is a wasteful number, since it uses less digits than its factorization.

71525121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23841710.

The product of its digits is 700, while the sum is 24.

The square root of 71525121 is about 8457.2525680625. The cubic root of 71525121 is about 415.1001277731.

Adding to 71525121 its reverse (12152517), we get a palindrome (83677638).

The spelling of 71525121 in words is "seventy-one million, five hundred twenty-five thousand, one hundred twenty-one".