260421012 has 72 divisors (see below), whose sum is σ = 687272040. Its totient is φ = 83066880.

The previous prime is 260420989. The next prime is 260421013. The reversal of 260421012 is 210124062.

It can be written as a sum of positive squares in 4 ways, for example, as 7420176 + 253000836 = 2724^2 + 15906^2 .

It is a super-2 number, since 2×260421012² = 135638206982208288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260421013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76564 + ... + 79892.

It is an arithmetic number, because the mean of its divisors is an integer number (9545445).

Almost surely, 2^260421012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260421012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343636020).

260421012 is an abundant number, since it is smaller than the sum of its proper divisors (426851028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

260421012 is a wasteful number, since it uses less digits than its factorization.

260421012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433 (or 3428 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 260421012 is about 16137.5652438650. The cubic root of 260421012 is about 638.5947455028.

Adding to 260421012 its reverse (210124062), we get a palindrome (470545074).

The spelling of 260421012 in words is "two hundred sixty million, four hundred twenty-one thousand, twelve".