70165421 has 2 divisors, whose sum is σ = 70165422. Its totient is φ = 70165420.

The previous prime is 70165411. The next prime is 70165427. The reversal of 70165421 is 12456107.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37515625 + 32649796 = 6125^2 + 5714^2 .

It is an emirp because it is prime and its reverse (12456107) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70165421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70165427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35082710 + 35082711.

It is an arithmetic number, because the mean of its divisors is an integer number (35082711).

Almost surely, 2^70165421 is an apocalyptic number.

It is an amenable number.

70165421 is a deficient number, since it is larger than the sum of its proper divisors (1).

70165421 is an equidigital number, since it uses as much as digits as its factorization.

70165421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 70165421 is about 8376.4802273986. The cubic root of 70165421 is about 412.4529160829.

The spelling of 70165421 in words is "seventy million, one hundred sixty-five thousand, four hundred twenty-one".