1256361260 has 48 divisors (see below), whose sum is σ = 3289386240. Its totient is φ = 391592640.

The previous prime is 1256361221. The next prime is 1256361313. The reversal of 1256361260 is 621636521.

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, 406370 + ... + 409449.

It is an arithmetic number, because the mean of its divisors is an integer number (68528880).

Almost surely, 2^1256361260 is an apocalyptic number.

1256361260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1256361260 is an abundant number, since it is smaller than the sum of its proper divisors (2033024980).

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

1256361260 is a wasteful number, since it uses less digits than its factorization.

1256361260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815846 (or 815844 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1256361260 is about 35445.1866972090. The cubic root of 1256361260 is about 1079.0415765592.

Adding to 1256361260 its reverse (621636521), we get a palindrome (1877997781).

The spelling of 1256361260 in words is "one billion, two hundred fifty-six million, three hundred sixty-one thousand, two hundred sixty".