1242313123 has 8 divisors (see below), whose sum is σ = 1254651840. Its totient is φ = 1230022080.

The previous prime is 1242313103. The next prime is 1242313133. The reversal of 1242313123 is 3213132421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242313123 - 2²¹ = 1240215971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242313094 and 1242313103.

It is not an unprimeable number, because it can be changed into a prime (1242313103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41638 + ... + 64948.

It is an arithmetic number, because the mean of its divisors is an integer number (156831480).

Almost surely, 2^1242313123 is an apocalyptic number.

1242313123 is a deficient number, since it is larger than the sum of its proper divisors (12338717).

1242313123 is a wasteful number, since it uses less digits than its factorization.

1242313123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23837.

The product of its digits is 864, while the sum is 22.

The square root of 1242313123 is about 35246.4625600925. The cubic root of 1242313123 is about 1075.0046866210.

Adding to 1242313123 its reverse (3213132421), we get a palindrome (4455445544).

The spelling of 1242313123 in words is "one billion, two hundred forty-two million, three hundred thirteen thousand, one hundred twenty-three".