420752881 has 2 divisors, whose sum is σ = 420752882. Its totient is φ = 420752880.

The previous prime is 420752867. The next prime is 420752897. The reversal of 420752881 is 188257024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407393856 + 13359025 = 20184^2 + 3655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420752881 is a prime.

It is a super-2 number, since 2×420752881² = 354065973739600322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420752881.

It is not a weakly prime, because it can be changed into another prime (420752581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210376440 + 210376441.

It is an arithmetic number, because the mean of its divisors is an integer number (210376441).

Almost surely, 2^420752881 is an apocalyptic number.

It is an amenable number.

420752881 is a deficient number, since it is larger than the sum of its proper divisors (1).

420752881 is an equidigital number, since it uses as much as digits as its factorization.

420752881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 420752881 is about 20512.2617231743. The cubic root of 420752881 is about 749.3344501585.

The spelling of 420752881 in words is "four hundred twenty million, seven hundred fifty-two thousand, eight hundred eighty-one".