260420505 has 8 divisors (see below), whose sum is σ = 416672832. Its totient is φ = 138890928.

The previous prime is 260420473. The next prime is 260420519. The reversal of 260420505 is 505024062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 260420505 - 2⁵ = 260420473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8680669 + ... + 8680698.

It is an arithmetic number, because the mean of its divisors is an integer number (52084104).

Almost surely, 2^260420505 is an apocalyptic number.

It is an amenable number.

260420505 is a deficient number, since it is larger than the sum of its proper divisors (156252327).

260420505 is a wasteful number, since it uses less digits than its factorization.

260420505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17361375.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 260420505 is about 16137.5495351680. The cubic root of 260420505 is about 638.5943310870.

Adding to 260420505 its reverse (505024062), we get a palindrome (765444567).

The spelling of 260420505 in words is "two hundred sixty million, four hundred twenty thousand, five hundred five".