1231667712 has 270 divisors, whose sum is σ = 3992107119. Its totient is φ = 365291520.

The previous prime is 1231667699. The next prime is 1231667719. The reversal of 1231667712 is 2177661321.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 615833856 + 615833856 = 24816^2 + 24816^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24816.

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

Its product of digits (21168) is a multiple of the sum of its prime divisors (63).

It is not an unprimeable number, because it can be changed into a prime (1231667719) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 26205673 + ... + 26205719.

Almost surely, 2^1231667712 is an apocalyptic number.

1231667712 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 1231667712

1231667712 is an abundant number, since it is smaller than the sum of its proper divisors (2760439407).

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

1231667712 is an equidigital number, since it uses as much as digits as its factorization.

1231667712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 63 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 1231667712 is about 35095.1237638507. The cubic root of 1231667712 is about 1071.9252936727.

The spelling of 1231667712 in words is "one billion, two hundred thirty-one million, six hundred sixty-seven thousand, seven hundred twelve".