420551269 has 2 divisors, whose sum is σ = 420551270. Its totient is φ = 420551268.

The previous prime is 420551203. The next prime is 420551281. The reversal of 420551269 is 962155024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 405821025 + 14730244 = 20145^2 + 3838^2 .

It is a cyclic number.

It is not a de Polignac number, because 420551269 - 2¹³ = 420543077 is a prime.

It is a super-2 number, since 2×420551269² = 353726739715020722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420551569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210275634 + 210275635.

It is an arithmetic number, because the mean of its divisors is an integer number (210275635).

Almost surely, 2^420551269 is an apocalyptic number.

It is an amenable number.

420551269 is a deficient number, since it is larger than the sum of its proper divisors (1).

420551269 is an equidigital number, since it uses as much as digits as its factorization.

420551269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 420551269 is about 20507.3467079483. The cubic root of 420551269 is about 749.2147449344.

The spelling of 420551269 in words is "four hundred twenty million, five hundred fifty-one thousand, two hundred sixty-nine".