1155401412 has 144 divisors (see below), whose sum is σ = 3201448320. Its totient is φ = 323079680.

The previous prime is 1155401411. The next prime is 1155401459. The reversal of 1155401412 is 2141045511.

It is not an unprimeable number, because it can be changed into a prime (1155401411) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 967888 + ... + 969080.

It is an arithmetic number, because the mean of its divisors is an integer number (22232280).

Almost surely, 2^1155401412 is an apocalyptic number.

1155401412 is a gapful number since it is divisible by the number (12) 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 1155401412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1600724160).

1155401412 is an abundant number, since it is smaller than the sum of its proper divisors (2046046908).

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

1155401412 is a wasteful number, since it uses less digits than its factorization.

1155401412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1155401412 is about 33991.1960954598. The cubic root of 1155401412 is about 1049.3272824718.

Adding to 1155401412 its reverse (2141045511), we get a palindrome (3296446923).

The spelling of 1155401412 in words is "one billion, one hundred fifty-five million, four hundred one thousand, four hundred twelve".