1242000031 has 2 divisors, whose sum is σ = 1242000032. Its totient is φ = 1242000030.

The previous prime is 1242000029. The next prime is 1242000041. The reversal of 1242000031 is 1300002421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242000031 - 2¹ = 1242000029 is a prime.

It is a super-2 number, since 2×1242000031² = 3085128154008001922, which contains 22 as substring.

Together with 1242000029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1241999975 and 1242000020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242000041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621000015 + 621000016.

It is an arithmetic number, because the mean of its divisors is an integer number (621000016).

Almost surely, 2^1242000031 is an apocalyptic number.

1242000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242000031 is an equidigital number, since it uses as much as digits as its factorization.

1242000031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1242000031 is about 35242.0208132281. The cubic root of 1242000031 is about 1074.9143702480.

Adding to 1242000031 its reverse (1300002421), we get a palindrome (2542002452).

The spelling of 1242000031 in words is "one billion, two hundred forty-two million, thirty-one", and thus it is an aban number.