71821034 has 16 divisors (see below), whose sum is σ = 109821096. Its totient is φ = 35217600.

The previous prime is 71821021. The next prime is 71821037. The reversal of 71821034 is 43012817.

It can be written as a sum of positive squares in 4 ways, for example, as 41538025 + 30283009 = 6445^2 + 5503^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71820994 and 71821012.

It is not an unprimeable number, because it can be changed into a prime (71821037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55604 + ... + 56880.

Almost surely, 2^71821034 is an apocalyptic number.

71821034 is a deficient number, since it is larger than the sum of its proper divisors (38000062).

71821034 is a wasteful number, since it uses less digits than its factorization.

71821034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 71821034 is about 8474.7291402145. The cubic root of 71821034 is about 415.6717894749.

The spelling of 71821034 in words is "seventy-one million, eight hundred twenty-one thousand, thirty-four".