70002421 has 2 divisors, whose sum is σ = 70002422. Its totient is φ = 70002420.

The previous prime is 70002407. The next prime is 70002461. The reversal of 70002421 is 12420007.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69906321 + 96100 = 8361^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 70002421 - 2¹⁷ = 69871349 is a prime.

It is a super-2 number, since 2×70002421² = 9800677891722482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70002395 and 70002404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70002461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35001210 + 35001211.

It is an arithmetic number, because the mean of its divisors is an integer number (35001211).

Almost surely, 2^70002421 is an apocalyptic number.

It is an amenable number.

70002421 is a deficient number, since it is larger than the sum of its proper divisors (1).

70002421 is an equidigital number, since it uses as much as digits as its factorization.

70002421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 70002421 is about 8366.7449465130. The cubic root of 70002421 is about 412.1332811793.

Adding to 70002421 its reverse (12420007), we get a palindrome (82422428).

The spelling of 70002421 in words is "seventy million, two thousand, four hundred twenty-one".