71030121 has 8 divisors (see below), whose sum is σ = 97266624. Its totient is φ = 46073520.

The previous prime is 71030119. The next prime is 71030143. The reversal of 71030121 is 12103017.

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

It is not a de Polignac number, because 71030121 - 2¹ = 71030119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71030121.

It is not an unprimeable number, because it can be changed into a prime (71030101) 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, 319845 + ... + 320066.

It is an arithmetic number, because the mean of its divisors is an integer number (12158328).

Almost surely, 2^71030121 is an apocalyptic number.

It is an amenable number.

71030121 is a deficient number, since it is larger than the sum of its proper divisors (26236503).

71030121 is a wasteful number, since it uses less digits than its factorization.

71030121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639951.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 71030121 is about 8427.9369361665. The cubic root of 71030121 is about 414.1403232699.

Adding to 71030121 its reverse (12103017), we get a palindrome (83133138).

The spelling of 71030121 in words is "seventy-one million, thirty thousand, one hundred twenty-one".