421713261 has 12 divisors (see below), whose sum is σ = 614731260. Its totient is φ = 278562240.

The previous prime is 421713247. The next prime is 421713317. The reversal of 421713261 is 162317124.

It can be written as a sum of positive squares in 2 ways, for example, as 188540361 + 233172900 = 13731^2 + 15270^2 .

It is not a de Polignac number, because 421713261 - 2⁶ = 421713197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421713221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213960 + ... + 215921.

It is an arithmetic number, because the mean of its divisors is an integer number (51227605).

Almost surely, 2^421713261 is an apocalyptic number.

It is an amenable number.

421713261 is a deficient number, since it is larger than the sum of its proper divisors (193017999).

421713261 is a wasteful number, since it uses less digits than its factorization.

421713261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429996 (or 429993 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 421713261 is about 20535.6582801721. The cubic root of 421713261 is about 749.9041424156.

The spelling of 421713261 in words is "four hundred twenty-one million, seven hundred thirteen thousand, two hundred sixty-one".