1261231488 has 96 divisors (see below), whose sum is σ = 3959303400. Its totient is φ = 382187520.

The previous prime is 1261231471. The next prime is 1261231493. The reversal of 1261231488 is 8841321621.

1261231488 is a `hidden beast` number, since 1 + 2 + 612 + 31 + 4 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37093 + ... + 62436.

Almost surely, 2^1261231488 is an apocalyptic number.

1261231488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1261231488 is an abundant number, since it is smaller than the sum of its proper divisors (2698071912).

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

1261231488 is a wasteful number, since it uses less digits than its factorization.

1261231488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99560 (or 99545 counting only the distinct ones).

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

The square root of 1261231488 is about 35513.8210841920. The cubic root of 1261231488 is about 1080.4340642044.

It can be divided in two parts, 12612 and 31488, that added together give a square (44100 = 210²).

The spelling of 1261231488 in words is "one billion, two hundred sixty-one million, two hundred thirty-one thousand, four hundred eighty-eight".