420995461 has 2 divisors, whose sum is σ = 420995462. Its totient is φ = 420995460.

The previous prime is 420995437. The next prime is 420995489. The reversal of 420995461 is 164599024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274730625 + 146264836 = 16575^2 + 12094^2 .

It is a cyclic number.

It is not a de Polignac number, because 420995461 - 2⁹ = 420994949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420995401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210497730 + 210497731.

It is an arithmetic number, because the mean of its divisors is an integer number (210497731).

Almost surely, 2^420995461 is an apocalyptic number.

It is an amenable number.

420995461 is a deficient number, since it is larger than the sum of its proper divisors (1).

420995461 is an equidigital number, since it uses as much as digits as its factorization.

420995461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 420995461 is about 20518.1739197230. The cubic root of 420995461 is about 749.4784290728.

The spelling of 420995461 in words is "four hundred twenty million, nine hundred ninety-five thousand, four hundred sixty-one".