260121630 has 64 divisors (see below), whose sum is σ = 648502848. Its totient is φ = 66723840.

The previous prime is 260121599. The next prime is 260121637. The reversal of 260121630 is 36121062.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 260121597 and 260121606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260121637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88342 + ... + 91238.

It is an arithmetic number, because the mean of its divisors is an integer number (10132857).

Almost surely, 2^260121630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260121630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324251424).

260121630 is an abundant number, since it is smaller than the sum of its proper divisors (388381218).

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

260121630 is a wasteful number, since it uses less digits than its factorization.

260121630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3021.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 260121630 is about 16128.2866417980. The cubic root of 260121630 is about 638.3499405239.

Adding to 260121630 its reverse (36121062), we get a palindrome (296242692).

The spelling of 260121630 in words is "two hundred sixty million, one hundred twenty-one thousand, six hundred thirty".