1231606272 has 160 divisors (see below), whose sum is σ = 3631142592. Its totient is φ = 368492544.

The previous prime is 1231606253. The next prime is 1231606279. The reversal of 1231606272 is 2726061321.

It is not an unprimeable number, because it can be changed into a prime (1231606279) 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, 737983 + ... + 739649.

Almost surely, 2^1231606272 is an apocalyptic number.

1231606272 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 1231606272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1815571296).

1231606272 is an abundant number, since it is smaller than the sum of its proper divisors (2399536320).

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

1231606272 is a wasteful number, since it uses less digits than its factorization.

1231606272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738 (or 1722 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1231606272 is about 35094.2484176539. The cubic root of 1231606272 is about 1071.9074695511.

Adding to 1231606272 its reverse (2726061321), we get a palindrome (3957667593).

The spelling of 1231606272 in words is "one billion, two hundred thirty-one million, six hundred six thousand, two hundred seventy-two".