424240261 has 4 divisors (see below), whose sum is σ = 435706252. Its totient is φ = 412774272.

The previous prime is 424240247. The next prime is 424240309. The reversal of 424240261 is 162042424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 352312900 + 71927361 = 18770^2 + 8481^2 .

It is a cyclic number.

It is not a de Polignac number, because 424240261 - 2¹³ = 424232069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424240961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5732940 + ... + 5733013.

It is an arithmetic number, because the mean of its divisors is an integer number (108926563).

Almost surely, 2^424240261 is an apocalyptic number.

It is an amenable number.

424240261 is a deficient number, since it is larger than the sum of its proper divisors (11465991).

424240261 is a wasteful number, since it uses less digits than its factorization.

424240261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11465990.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 424240261 is about 20597.0935085512. The cubic root of 424240261 is about 751.3990248315.

Adding to 424240261 its reverse (162042424), we get a palindrome (586282685).

The spelling of 424240261 in words is "four hundred twenty-four million, two hundred forty thousand, two hundred sixty-one".