1260536240 has 40 divisors (see below), whose sum is σ = 2993112000. Its totient is φ = 493485056.

The previous prime is 1260536161. The next prime is 1260536261. The reversal of 1260536240 is 426350621.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1260536240² = 3177903224706675200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163865 + ... + 171384.

It is an arithmetic number, because the mean of its divisors is an integer number (74827800).

Almost surely, 2^1260536240 is an apocalyptic number.

1260536240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1260536240 is an abundant number, since it is smaller than the sum of its proper divisors (1732575760).

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

1260536240 is a wasteful number, since it uses less digits than its factorization.

1260536240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335309 (or 335303 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1260536240 is about 35504.0313204008. The cubic root of 1260536240 is about 1080.2354996274.

Adding to 1260536240 its reverse (426350621), we get a palindrome (1686886861).

The spelling of 1260536240 in words is "one billion, two hundred sixty million, five hundred thirty-six thousand, two hundred forty".