1261436088 has 32 divisors (see below), whose sum is σ = 3440280960. Its totient is φ = 382253280.

The previous prime is 1261436083. The next prime is 1261436129. The reversal of 1261436088 is 8806341621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261436083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2388820 + ... + 2389347.

It is an arithmetic number, because the mean of its divisors is an integer number (107508780).

Almost surely, 2^1261436088 is an apocalyptic number.

It is an amenable number.

1261436088 is an abundant number, since it is smaller than the sum of its proper divisors (2178844872).

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

1261436088 is a wasteful number, since it uses less digits than its factorization.

1261436088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778187 (or 4778183 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1261436088 is about 35516.7015360379. The cubic root of 1261436088 is about 1080.4924845815.

It can be divided in two parts, 126143 and 6088, that added together give a palindrome (132231).

The spelling of 1261436088 in words is "one billion, two hundred sixty-one million, four hundred thirty-six thousand, eighty-eight".