1231394706 has 48 divisors (see below), whose sum is σ = 2758743000. Its totient is φ = 396658944.

The previous prime is 1231394663. The next prime is 1231394713. The reversal of 1231394706 is 6074931321.

It can be written as a sum of positive squares in 4 ways, for example, as 728514081 + 502880625 = 26991^2 + 22425^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93030 + ... + 105438.

Almost surely, 2^1231394706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231394706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1379371500).

1231394706 is an abundant number, since it is smaller than the sum of its proper divisors (1527348294).

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

1231394706 is a wasteful number, since it uses less digits than its factorization.

1231394706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12603 (or 12600 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 1231394706 is about 35091.2340335874. The cubic root of 1231394706 is about 1071.8460884188.

It can be divided in two parts, 1231394 and 706, that added together give a square (1232100 = 1110²).

The spelling of 1231394706 in words is "one billion, two hundred thirty-one million, three hundred ninety-four thousand, seven hundred six".