1312123654 has 8 divisors (see below), whose sum is σ = 1974026808. Its totient is φ = 654114720.

The previous prime is 1312123649. The next prime is 1312123667. The reversal of 1312123654 is 4563212131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972712 + ... + 974059.

It is an arithmetic number, because the mean of its divisors is an integer number (246753351).

Almost surely, 2^1312123654 is an apocalyptic number.

1312123654 is a deficient number, since it is larger than the sum of its proper divisors (661903154).

1312123654 is a wasteful number, since it uses less digits than its factorization.

1312123654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947110.

The product of its digits is 4320, while the sum is 28.

The square root of 1312123654 is about 36223.2474248237. The cubic root of 1312123654 is about 1094.7751264277.

Adding to 1312123654 its reverse (4563212131), we get a palindrome (5875335785).

The spelling of 1312123654 in words is "one billion, three hundred twelve million, one hundred twenty-three thousand, six hundred fifty-four".