71221070 has 8 divisors (see below), whose sum is σ = 128197944. Its totient is φ = 28488424.

The previous prime is 71221049. The next prime is 71221081. The reversal of 71221070 is 7012217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3561044 + ... + 3561063.

It is an arithmetic number, because the mean of its divisors is an integer number (16024743).

Almost surely, 2^71221070 is an apocalyptic number.

71221070 is a deficient number, since it is larger than the sum of its proper divisors (56976874).

71221070 is a wasteful number, since it uses less digits than its factorization.

71221070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122114.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 71221070 is about 8439.2576687763. The cubic root of 71221070 is about 414.5110998845.

Adding to 71221070 its reverse (7012217), we get a palindrome (78233287).

It can be divided in two parts, 7122 and 1070, that added together give a 13-th power (8192 = 2¹³).

The spelling of 71221070 in words is "seventy-one million, two hundred twenty-one thousand, seventy".