421705269 has 24 divisors (see below), whose sum is σ = 636668760. Its totient is φ = 268627968.

The previous prime is 421705267. The next prime is 421705279. The reversal of 421705269 is 962507124.

It can be written as a sum of positive squares in 4 ways, for example, as 192182769 + 229522500 = 13863^2 + 15150^2 .

It is not a de Polignac number, because 421705269 - 2¹ = 421705267 is a prime.

It is a super-2 number, since 2×421705269² = 355670667804724722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421705267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16989 + ... + 33645.

It is an arithmetic number, because the mean of its divisors is an integer number (26527865).

Almost surely, 2^421705269 is an apocalyptic number.

It is an amenable number.

421705269 is a deficient number, since it is larger than the sum of its proper divisors (214963491).

421705269 is a wasteful number, since it uses less digits than its factorization.

421705269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16789 (or 16786 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 421705269 is about 20535.4636908934. The cubic root of 421705269 is about 749.8994051748.

The spelling of 421705269 in words is "four hundred twenty-one million, seven hundred five thousand, two hundred sixty-nine".