1260156500 has 24 divisors (see below), whose sum is σ = 2752182888. Its totient is φ = 504062400.

The previous prime is 1260156473. The next prime is 1260156509. The reversal of 1260156500 is 56510621.

It can be written as a sum of positive squares in 4 ways, for example, as 17875984 + 1242280516 = 4228^2 + 35246^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1260156500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260156509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1259657 + ... + 1260656.

It is an arithmetic number, because the mean of its divisors is an integer number (114674287).

Almost surely, 2^1260156500 is an apocalyptic number.

1260156500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1260156500 is an abundant number, since it is smaller than the sum of its proper divisors (1492026388).

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

1260156500 is a wasteful number, since it uses less digits than its factorization.

1260156500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520332 (or 2520320 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1260156500 is about 35498.6830741649. The cubic root of 1260156500 is about 1080.1270140970.

The spelling of 1260156500 in words is "one billion, two hundred sixty million, one hundred fifty-six thousand, five hundred".