1231394494 has 12 divisors (see below), whose sum is σ = 2030274792. Its totient is φ = 559724660.

The previous prime is 1231394453. The next prime is 1231394509. The reversal of 1231394494 is 4944931321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2543962 + ... + 2544445.

It is an arithmetic number, because the mean of its divisors is an integer number (169189566).

Almost surely, 2^1231394494 is an apocalyptic number.

1231394494 is a deficient number, since it is larger than the sum of its proper divisors (798880298).

1231394494 is a wasteful number, since it uses less digits than its factorization.

1231394494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5088431 (or 5088420 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 1231394494 is about 35091.2310128898. The cubic root of 1231394494 is about 1071.8460269083.

The spelling of 1231394494 in words is "one billion, two hundred thirty-one million, three hundred ninety-four thousand, four hundred ninety-four".