420540277 has 2 divisors, whose sum is σ = 420540278. Its totient is φ = 420540276.

The previous prime is 420540233. The next prime is 420540347. The reversal of 420540277 is 772045024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380484036 + 40056241 = 19506^2 + 6329^2 .

It is a cyclic number.

It is not a de Polignac number, because 420540277 - 2⁷ = 420540149 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 (420547277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210270138 + 210270139.

It is an arithmetic number, because the mean of its divisors is an integer number (210270139).

Almost surely, 2^420540277 is an apocalyptic number.

It is an amenable number.

420540277 is a deficient number, since it is larger than the sum of its proper divisors (1).

420540277 is an equidigital number, since it uses as much as digits as its factorization.

420540277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 420540277 is about 20507.0787046815. The cubic root of 420540277 is about 749.2082174384.

The spelling of 420540277 in words is "four hundred twenty million, five hundred forty thousand, two hundred seventy-seven".