260420805 has 16 divisors (see below), whose sum is σ = 462970560. Its totient is φ = 138891024.

The previous prime is 260420803. The next prime is 260420813. The reversal of 260420805 is 508024062.

It is not a de Polignac number, because 260420805 - 2¹ = 260420803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260420803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 964387 + ... + 964656.

It is an arithmetic number, because the mean of its divisors is an integer number (28935660).

Almost surely, 2^260420805 is an apocalyptic number.

It is an amenable number.

260420805 is a deficient number, since it is larger than the sum of its proper divisors (202549755).

260420805 is a wasteful number, since it uses less digits than its factorization.

260420805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929057 (or 1929051 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 260420805 is about 16137.5588302568. The cubic root of 260420805 is about 638.5945763035.

Adding to 260420805 its reverse (508024062), we get a palindrome (768444867).

It can be divided in two parts, 2604 and 20805, that added together give a square (23409 = 153²).

The spelling of 260420805 in words is "two hundred sixty million, four hundred twenty thousand, eight hundred five".