1242969131 has 2 divisors, whose sum is σ = 1242969132. Its totient is φ = 1242969130.

The previous prime is 1242969103. The next prime is 1242969181. The reversal of 1242969131 is 1319692421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242969131 - 2¹⁴ = 1242952747 is a prime.

It is a super-2 number, since 2×1242969131² = 3089944521237790322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1242969181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621484565 + 621484566.

It is an arithmetic number, because the mean of its divisors is an integer number (621484566).

Almost surely, 2^1242969131 is an apocalyptic number.

1242969131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242969131 is an equidigital number, since it uses as much as digits as its factorization.

1242969131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 1242969131 is about 35255.7673437978. The cubic root of 1242969131 is about 1075.1938733802.

The spelling of 1242969131 in words is "one billion, two hundred forty-two million, nine hundred sixty-nine thousand, one hundred thirty-one".