70017121 has 4 divisors (see below), whose sum is σ = 70039044. Its totient is φ = 69995200.

The previous prime is 70017113. The next prime is 70017137. The reversal of 70017121 is 12171007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12171007 = 557 ⋅21851.

It can be written as a sum of positive squares in 2 ways, for example, as 19678096 + 50339025 = 4436^2 + 7095^2 .

It is a cyclic number.

It is not a de Polignac number, because 70017121 - 2³ = 70017113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70017421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5140 + ... + 12901.

It is an arithmetic number, because the mean of its divisors is an integer number (17509761).

Almost surely, 2^70017121 is an apocalyptic number.

It is an amenable number.

70017121 is a deficient number, since it is larger than the sum of its proper divisors (21923).

70017121 is a wasteful number, since it uses less digits than its factorization.

70017121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21922.

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 70017121 is about 8367.6233782359. The cubic root of 70017121 is about 412.1621274921.

Adding to 70017121 its reverse (12171007), we get a palindrome (82188128).

The spelling of 70017121 in words is "seventy million, seventeen thousand, one hundred twenty-one".