421562513 has 2 divisors, whose sum is σ = 421562514. Its totient is φ = 421562512.

The previous prime is 421562509. The next prime is 421562527. The reversal of 421562513 is 315265124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405297424 + 16265089 = 20132^2 + 4033^2 .

It is a cyclic number.

It is not a de Polignac number, because 421562513 - 2² = 421562509 is a prime.

It is not a weakly prime, because it can be changed into another prime (421562503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210781256 + 210781257.

It is an arithmetic number, because the mean of its divisors is an integer number (210781257).

Almost surely, 2^421562513 is an apocalyptic number.

It is an amenable number.

421562513 is a deficient number, since it is larger than the sum of its proper divisors (1).

421562513 is an equidigital number, since it uses as much as digits as its factorization.

421562513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 421562513 is about 20531.9875560064. The cubic root of 421562513 is about 749.8147767788.

The spelling of 421562513 in words is "four hundred twenty-one million, five hundred sixty-two thousand, five hundred thirteen".