71021304 has 48 divisors (see below), whose sum is σ = 192741120. Its totient is φ = 23625600.

The previous prime is 71021303. The next prime is 71021333. The reversal of 71021304 is 40312017.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71021303) 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, 61129 + ... + 62279.

It is an arithmetic number, because the mean of its divisors is an integer number (4015440).

Almost surely, 2^71021304 is an apocalyptic number.

It is an amenable number.

71021304 is an abundant number, since it is smaller than the sum of its proper divisors (121719816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71021304 is a wasteful number, since it uses less digits than its factorization.

71021304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020 (or 2013 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 71021304 is about 8427.4138381831. The cubic root of 71021304 is about 414.1231867543.

The spelling of 71021304 in words is "seventy-one million, twenty-one thousand, three hundred four".