1201231776 has 96 divisors (see below), whose sum is σ = 3269947968. Its totient is φ = 385832960.

The previous prime is 1201231771. The next prime is 1201231847. The reversal of 1201231776 is 6771321021.

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

It is a super-2 number, since 2×1201231776² = 2885915559344228352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201231771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324850 + ... + 328526.

It is an arithmetic number, because the mean of its divisors is an integer number (34061958).

Almost surely, 2^1201231776 is an apocalyptic number.

1201231776 is a gapful number since it is divisible by the number (16) 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 1201231776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634973984).

1201231776 is an abundant number, since it is smaller than the sum of its proper divisors (2068716192).

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

1201231776 is a wasteful number, since it uses less digits than its factorization.

1201231776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814 (or 3806 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 1201231776 is about 34658.7907463604. The cubic root of 1201231776 is about 1063.0220441004.

Adding to 1201231776 its reverse (6771321021), we get a palindrome (7972552797).

The spelling of 1201231776 in words is "one billion, two hundred one million, two hundred thirty-one thousand, seven hundred seventy-six".