1282872261 has 16 divisors (see below), whose sum is σ = 1901206080. Its totient is φ = 762827520.

The previous prime is 1282872211. The next prime is 1282872271. The reversal of 1282872261 is 1622782821.

It is not a de Polignac number, because 1282872261 - 2⁷ = 1282872133 is a prime.

It is a super-3 number, since 3×1282872261³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282872211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364996 + ... + 368493.

It is an arithmetic number, because the mean of its divisors is an integer number (118825380).

Almost surely, 2^1282872261 is an apocalyptic number.

1282872261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1282872261 is a deficient number, since it is larger than the sum of its proper divisors (618333819).

1282872261 is a wasteful number, since it uses less digits than its factorization.

1282872261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733556.

The product of its digits is 43008, while the sum is 39.

The square root of 1282872261 is about 35817.2062143322. The cubic root of 1282872261 is about 1086.5785769966.

The spelling of 1282872261 in words is "one billion, two hundred eighty-two million, eight hundred seventy-two thousand, two hundred sixty-one".