1231326747 has 24 divisors (see below), whose sum is σ = 2102761440. Its totient is φ = 679351680.

The previous prime is 1231326713. The next prime is 1231326763. The reversal of 1231326747 is 7476231321.

It is not a de Polignac number, because 1231326747 - 2¹⁸ = 1231064603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231326797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335154 + ... + 338807.

It is an arithmetic number, because the mean of its divisors is an integer number (87615060).

Almost surely, 2^1231326747 is an apocalyptic number.

1231326747 is a deficient number, since it is larger than the sum of its proper divisors (871434693).

1231326747 is a wasteful number, since it uses less digits than its factorization.

1231326747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674003 (or 674000 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 1231326747 is about 35090.2657014734. The cubic root of 1231326747 is about 1071.8263701465.

It can be divided in two parts, 12313 and 26747, that added together give a triangular number (39060 = T₂₇₉).

The spelling of 1231326747 in words is "one billion, two hundred thirty-one million, three hundred twenty-six thousand, seven hundred forty-seven".