421002611 has 2 divisors, whose sum is σ = 421002612. Its totient is φ = 421002610.

The previous prime is 421002577. The next prime is 421002623. The reversal of 421002611 is 116200124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421002611 - 2²² = 416808307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421002611.

It is not a weakly prime, because it can be changed into another prime (421002011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210501305 + 210501306.

It is an arithmetic number, because the mean of its divisors is an integer number (210501306).

Almost surely, 2^421002611 is an apocalyptic number.

421002611 is a deficient number, since it is larger than the sum of its proper divisors (1).

421002611 is an equidigital number, since it uses as much as digits as its factorization.

421002611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 421002611 is about 20518.3481547614. The cubic root of 421002611 is about 749.4826719851.

Adding to 421002611 its reverse (116200124), we get a palindrome (537202735).

The spelling of 421002611 in words is "four hundred twenty-one million, two thousand, six hundred eleven".