420614861 has 2 divisors, whose sum is σ = 420614862. Its totient is φ = 420614860.

The previous prime is 420614849. The next prime is 420614899. The reversal of 420614861 is 168416024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349465636 + 71149225 = 18694^2 + 8435^2 .

It is a cyclic number.

It is not a de Polignac number, because 420614861 - 2¹⁸ = 420352717 is a prime.

It is a super-2 number, since 2×420614861² = 353833722588098642, which contains 22 as substring.

It is equal to p_22375481 and since 420614861 and 22375481 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420611861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210307430 + 210307431.

It is an arithmetic number, because the mean of its divisors is an integer number (210307431).

Almost surely, 2^420614861 is an apocalyptic number.

It is an amenable number.

420614861 is a deficient number, since it is larger than the sum of its proper divisors (1).

420614861 is an equidigital number, since it uses as much as digits as its factorization.

420614861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 420614861 is about 20508.8971180802. The cubic root of 420614861 is about 749.2525062145.

The spelling of 420614861 in words is "four hundred twenty million, six hundred fourteen thousand, eight hundred sixty-one".