1200872881 has 4 divisors (see below), whose sum is σ = 1293247732. Its totient is φ = 1108498032.

The previous prime is 1200872879. The next prime is 1200872891. The reversal of 1200872881 is 1882780021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1882780021 = 29 ⋅64923449.

It can be written as a sum of positive squares in 2 ways, for example, as 433305856 + 767567025 = 20816^2 + 27705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200872881 - 2¹ = 1200872879 is a prime.

It is a super-2 number, since 2×1200872881² = 2884191352642480322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200872881.

It is not an unprimeable number, because it can be changed into a prime (1200872831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46187406 + ... + 46187431.

It is an arithmetic number, because the mean of its divisors is an integer number (323311933).

Almost surely, 2^1200872881 is an apocalyptic number.

It is an amenable number.

1200872881 is a deficient number, since it is larger than the sum of its proper divisors (92374851).

1200872881 is an equidigital number, since it uses as much as digits as its factorization.

1200872881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92374850.

The product of its (nonzero) digits is 14336, while the sum is 37.

The square root of 1200872881 is about 34653.6128130964. The cubic root of 1200872881 is about 1062.9161663102.

The spelling of 1200872881 in words is "one billion, two hundred million, eight hundred seventy-two thousand, eight hundred eighty-one".