420013571 has 2 divisors, whose sum is σ = 420013572. Its totient is φ = 420013570.

The previous prime is 420013537. The next prime is 420013613. The reversal of 420013571 is 175310024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420013571 - 2²² = 415819267 is a prime.

It is a super-2 number, since 2×420013571² = 352822799648344082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420013171) by changing a digit.

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 as a sum of consecutive naturals, namely, 210006785 + 210006786.

It is an arithmetic number, because the mean of its divisors is an integer number (210006786).

Almost surely, 2^420013571 is an apocalyptic number.

420013571 is a deficient number, since it is larger than the sum of its proper divisors (1).

420013571 is an equidigital number, since it uses as much as digits as its factorization.

420013571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 420013571 is about 20494.2326277419. The cubic root of 420013571 is about 748.8953046260.

Adding to 420013571 its reverse (175310024), we get a palindrome (595323595).

It can be divided in two parts, 4200 and 13571, that added together give a palindrome (17771).

The spelling of 420013571 in words is "four hundred twenty million, thirteen thousand, five hundred seventy-one".