1261260264 has 32 divisors (see below), whose sum is σ = 3439801440. Its totient is φ = 382200000.

The previous prime is 1261260229. The next prime is 1261260317. The reversal of 1261260264 is 4620621621.

1261260264 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 2388487 + ... + 2389014.

It is an arithmetic number, because the mean of its divisors is an integer number (107493795).

Almost surely, 2^1261260264 is an apocalyptic number.

It is an amenable number.

1261260264 is an abundant number, since it is smaller than the sum of its proper divisors (2178541176).

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

1261260264 is a wasteful number, since it uses less digits than its factorization.

1261260264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777521 (or 4777517 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1261260264 is about 35514.2262199249. The cubic root of 1261260264 is about 1080.4422811296.

Adding to 1261260264 its reverse (4620621621), we get a palindrome (5881881885).

The spelling of 1261260264 in words is "one billion, two hundred sixty-one million, two hundred sixty thousand, two hundred sixty-four".