260731421 has 4 divisors (see below), whose sum is σ = 269142144. Its totient is φ = 252320700.

The previous prime is 260731417. The next prime is 260731439. The reversal of 260731421 is 124137062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 260731421 - 2² = 260731417 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 (260731021) 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, 4205315 + ... + 4205376.

It is an arithmetic number, because the mean of its divisors is an integer number (67285536).

Almost surely, 2^260731421 is an apocalyptic number.

It is an amenable number.

260731421 is a deficient number, since it is larger than the sum of its proper divisors (8410723).

260731421 is an equidigital number, since it uses as much as digits as its factorization.

260731421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8410722.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 260731421 is about 16147.1799705088. The cubic root of 260731421 is about 638.8483692389.

Adding to 260731421 its reverse (124137062), we get a palindrome (384868483).

The spelling of 260731421 in words is "two hundred sixty million, seven hundred thirty-one thousand, four hundred twenty-one".