1242642329 has 2 divisors, whose sum is σ = 1242642330. Its totient is φ = 1242642328.

The previous prime is 1242642277. The next prime is 1242642341. The reversal of 1242642329 is 9232462421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 925802329 + 316840000 = 30427^2 + 17800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242642329 - 2¹² = 1242638233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242642629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621321164 + 621321165.

It is an arithmetic number, because the mean of its divisors is an integer number (621321165).

Almost surely, 2^1242642329 is an apocalyptic number.

It is an amenable number.

1242642329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242642329 is an equidigital number, since it uses as much as digits as its factorization.

1242642329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

The square root of 1242642329 is about 35251.1323080550. The cubic root of 1242642329 is about 1075.0996349693.

The spelling of 1242642329 in words is "one billion, two hundred forty-two million, six hundred forty-two thousand, three hundred twenty-nine".