71241621 has 16 divisors (see below), whose sum is σ = 109079040. Its totient is φ = 40903920.

The previous prime is 71241619. The next prime is 71241631. The reversal of 71241621 is 12614217.

It is not a de Polignac number, because 71241621 - 2¹ = 71241619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71241591 and 71241600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71241631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56185 + ... + 57438.

It is an arithmetic number, because the mean of its divisors is an integer number (6817440).

Almost surely, 2^71241621 is an apocalyptic number.

It is an amenable number.

71241621 is a deficient number, since it is larger than the sum of its proper divisors (37837419).

71241621 is a wasteful number, since it uses less digits than its factorization.

71241621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113656.

The product of its digits is 672, while the sum is 24.

The square root of 71241621 is about 8440.4751643495. The cubic root of 71241621 is about 414.5509654205.

Adding to 71241621 its reverse (12614217), we get a palindrome (83855838).

The spelling of 71241621 in words is "seventy-one million, two hundred forty-one thousand, six hundred twenty-one".