421502953 has 2 divisors, whose sum is σ = 421502954. Its totient is φ = 421502952.

The previous prime is 421502941. The next prime is 421502957. The reversal of 421502953 is 359205124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416649744 + 4853209 = 20412^2 + 2203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421502953 is a prime.

It is not a weakly prime, because it can be changed into another prime (421502957) 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, 210751476 + 210751477.

It is an arithmetic number, because the mean of its divisors is an integer number (210751477).

Almost surely, 2^421502953 is an apocalyptic number.

It is an amenable number.

421502953 is a deficient number, since it is larger than the sum of its proper divisors (1).

421502953 is an equidigital number, since it uses as much as digits as its factorization.

421502953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 421502953 is about 20530.5370850351. The cubic root of 421502953 is about 749.7794628612.

The spelling of 421502953 in words is "four hundred twenty-one million, five hundred two thousand, nine hundred fifty-three".