260742421729 has 4 divisors (see below), whose sum is σ = 260980979476. Its totient is φ = 260503863984.

The previous prime is 260742421703. The next prime is 260742421757. The reversal of 260742421729 is 927124247062.

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 169204709025 + 91537712704 = 411345^2 + 302552^2 .

It is a cyclic number.

It is not a de Polignac number, because 260742421729 - 2⁷ = 260742421601 is a prime.

It is a super-2 number, since 2×260742421729² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260742421229) 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, 119277234 + ... + 119279419.

It is an arithmetic number, because the mean of its divisors is an integer number (65245244869).

Almost surely, 2^260742421729 is an apocalyptic number.

It is an amenable number.

260742421729 is a deficient number, since it is larger than the sum of its proper divisors (238557747).

260742421729 is a wasteful number, since it uses less digits than its factorization.

260742421729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238557746.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 260742421729 in words is "two hundred sixty billion, seven hundred forty-two million, four hundred twenty-one thousand, seven hundred twenty-nine".