1242140929 has 2 divisors, whose sum is σ = 1242140930. Its totient is φ = 1242140928.

The previous prime is 1242140923. The next prime is 1242140947. The reversal of 1242140929 is 9290412421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727758529 + 514382400 = 26977^2 + 22680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242140929 - 2²³ = 1233752321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242140894 and 1242140903.

It is not a weakly prime, because it can be changed into another prime (1242140923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621070464 + 621070465.

It is an arithmetic number, because the mean of its divisors is an integer number (621070465).

Almost surely, 2^1242140929 is an apocalyptic number.

It is an amenable number.

1242140929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242140929 is an equidigital number, since it uses as much as digits as its factorization.

1242140929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1242140929 is about 35244.0197622235. The cubic root of 1242140929 is about 1074.9550163978.

The spelling of 1242140929 in words is "one billion, two hundred forty-two million, one hundred forty thousand, nine hundred twenty-nine".