420651503 has 2 divisors, whose sum is σ = 420651504. Its totient is φ = 420651502.

The previous prime is 420651481. The next prime is 420651529. The reversal of 420651503 is 305156024.

It is an a-pointer prime, because the next prime (420651529) can be obtained adding 420651503 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420651503 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420651563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210325751 + 210325752.

It is an arithmetic number, because the mean of its divisors is an integer number (210325752).

Almost surely, 2^420651503 is an apocalyptic number.

420651503 is a deficient number, since it is larger than the sum of its proper divisors (1).

420651503 is an equidigital number, since it uses as much as digits as its factorization.

420651503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 420651503 is about 20509.7904182368. The cubic root of 420651503 is about 749.2742627078.

The spelling of 420651503 in words is "four hundred twenty million, six hundred fifty-one thousand, five hundred three".