1261508360 has 64 divisors (see below), whose sum is σ = 3265470720. Its totient is φ = 429638400.

The previous prime is 1261508359. The next prime is 1261508447. The reversal of 1261508360 is 638051621.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27362 + ... + 57198.

It is an arithmetic number, because the mean of its divisors is an integer number (51022980).

Almost surely, 2^1261508360 is an apocalyptic number.

1261508360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261508360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632735360).

1261508360 is an abundant number, since it is smaller than the sum of its proper divisors (2003962360).

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

1261508360 is a wasteful number, since it uses less digits than its factorization.

1261508360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30006 (or 30002 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1261508360 is about 35517.7189582890. The cubic root of 1261508360 is about 1080.5131192275.

Adding to 1261508360 its reverse (638051621), we get a palindrome (1899559981).

The spelling of 1261508360 in words is "one billion, two hundred sixty-one million, five hundred eight thousand, three hundred sixty".