71421903 has 12 divisors (see below), whose sum is σ = 117902928. Its totient is φ = 40812480.

The previous prime is 71421881. The next prime is 71421929. The reversal of 71421903 is 30912417.

It is not a de Polignac number, because 71421903 - 2⁵ = 71421871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71426903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 566778 + ... + 566903.

It is an arithmetic number, because the mean of its divisors is an integer number (9825244).

Almost surely, 2^71421903 is an apocalyptic number.

71421903 is a deficient number, since it is larger than the sum of its proper divisors (46481025).

71421903 is a wasteful number, since it uses less digits than its factorization.

71421903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133694 (or 1133691 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 71421903 is about 8451.1480285225. The cubic root of 71421903 is about 414.9003544570.

It can be divided in two parts, 7142 and 1903, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 71421903 in words is "seventy-one million, four hundred twenty-one thousand, nine hundred three".