1231455360 has 128 divisors (see below), whose sum is σ = 4131979200. Its totient is φ = 311095296.

The previous prime is 1231455317. The next prime is 1231455389. The reversal of 1231455360 is 635541321.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19602 + ... + 53358.

Almost surely, 2^1231455360 is an apocalyptic number.

1231455360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231455360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2065989600).

1231455360 is an abundant number, since it is smaller than the sum of its proper divisors (2900523840).

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

1231455360 is a wasteful number, since it uses less digits than its factorization.

1231455360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33798 (or 33786 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1231455360 is about 35092.0982558752. The cubic root of 1231455360 is about 1071.8636865361.

Adding to 1231455360 its reverse (635541321), we get a palindrome (1866996681).

The spelling of 1231455360 in words is "one billion, two hundred thirty-one million, four hundred fifty-five thousand, three hundred sixty".