1261544088 has 64 divisors (see below), whose sum is σ = 3692344320. Its totient is φ = 351648000.

The previous prime is 1261544057. The next prime is 1261544149. The reversal of 1261544088 is 8804451621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84688 + ... + 98463.

It is an arithmetic number, because the mean of its divisors is an integer number (57692880).

Almost surely, 2^1261544088 is an apocalyptic number.

It is an amenable number.

1261544088 is an abundant number, since it is smaller than the sum of its proper divisors (2430800232).

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

1261544088 is a wasteful number, since it uses less digits than its factorization.

1261544088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183208 (or 183204 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 1261544088 is about 35518.2219149551. The cubic root of 1261544088 is about 1080.5233197699.

The spelling of 1261544088 in words is "one billion, two hundred sixty-one million, five hundred forty-four thousand, eighty-eight".