70521212 has 12 divisors (see below), whose sum is σ = 125103216. Its totient is φ = 34777440.

The previous prime is 70521193. The next prime is 70521221. The reversal of 70521212 is 21212507.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120464 + ... + 121047.

It is an arithmetic number, because the mean of its divisors is an integer number (10425268).

Almost surely, 2^70521212 is an apocalyptic number.

It is an amenable number.

70521212 is a deficient number, since it is larger than the sum of its proper divisors (54582004).

70521212 is a wasteful number, since it uses less digits than its factorization.

70521212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241588 (or 241586 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 70521212 is about 8397.6908730912. The cubic root of 70521212 is about 413.1488889748.

Adding to 70521212 its reverse (21212507), we get a palindrome (91733719).

The spelling of 70521212 in words is "seventy million, five hundred twenty-one thousand, two hundred twelve".