1262861280 has 240 divisors, whose sum is σ = 4486348944. Its totient is φ = 335923200.

The previous prime is 1262861261. The next prime is 1262861297. The reversal of 1262861280 is 821682621.

1262861280 is a `hidden beast` number, since 1 + 2 + 628 + 6 + 1 + 28 + 0 = 666.

1262861280 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×1262861280² = 3189637225046476800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3149080 + ... + 3149480.

Almost surely, 2^1262861280 is an apocalyptic number.

1262861280 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 1262861280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2243174472).

1262861280 is an abundant number, since it is smaller than the sum of its proper divisors (3223487664).

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

1262861280 is an frugal number, since it uses more digits than its factorization.

1262861280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1262861280 is about 35536.7595596447. The cubic root of 1262861280 is about 1080.8992510399.

The spelling of 1262861280 in words is "one billion, two hundred sixty-two million, eight hundred sixty-one thousand, two hundred eighty".