70852021 has 2 divisors, whose sum is σ = 70852022. Its totient is φ = 70852020.

The previous prime is 70852013. The next prime is 70852027. The reversal of 70852021 is 12025807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53085796 + 17766225 = 7286^2 + 4215^2 .

It is a cyclic number.

It is not a de Polignac number, because 70852021 - 2³ = 70852013 is a prime.

It is a super-3 number, since 3×70852021³ (a number of 25 digits) contains 333 as substring.

It is equal to p_4165180 and since 70852021 and 4165180 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70852027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35426010 + 35426011.

It is an arithmetic number, because the mean of its divisors is an integer number (35426011).

Almost surely, 2^70852021 is an apocalyptic number.

It is an amenable number.

70852021 is a deficient number, since it is larger than the sum of its proper divisors (1).

70852021 is an equidigital number, since it uses as much as digits as its factorization.

70852021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 70852021 is about 8417.3642549197. The cubic root of 70852021 is about 413.7938968830.

Adding to 70852021 its reverse (12025807), we get a palindrome (82877828).

The spelling of 70852021 in words is "seventy million, eight hundred fifty-two thousand, twenty-one".