71048421 has 20 divisors (see below), whose sum is σ = 106578252. Its totient is φ = 47167488.

The previous prime is 71048407. The next prime is 71048431. The reversal of 71048421 is 12484017.

It can be written as a sum of positive squares in 2 ways, for example, as 68707521 + 2340900 = 8289^2 + 1530^2 .

It is not a de Polignac number, because 71048421 - 2⁹ = 71047909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71048431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19111 + ... + 22523.

Almost surely, 2^71048421 is an apocalyptic number.

It is an amenable number.

71048421 is a deficient number, since it is larger than the sum of its proper divisors (35529831).

71048421 is a wasteful number, since it uses less digits than its factorization.

71048421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682 (or 3673 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 71048421 is about 8429.0225411966. The cubic root of 71048421 is about 414.1758861975.

The spelling of 71048421 in words is "seventy-one million, forty-eight thousand, four hundred twenty-one".