1242130393 has 4 divisors (see below), whose sum is σ = 1419577600. Its totient is φ = 1064683188.

The previous prime is 1242130391. The next prime is 1242130411. The reversal of 1242130393 is 3930312421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3930312421 = 7 ⋅561473203.

It is a cyclic number.

It is not a de Polignac number, because 1242130393 - 2¹ = 1242130391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242130391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88723593 + ... + 88723606.

It is an arithmetic number, because the mean of its divisors is an integer number (354894400).

Almost surely, 2^1242130393 is an apocalyptic number.

It is an amenable number.

1242130393 is a deficient number, since it is larger than the sum of its proper divisors (177447207).

1242130393 is an equidigital number, since it uses as much as digits as its factorization.

1242130393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177447206.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1242130393 is about 35243.8702897397. The cubic root of 1242130393 is about 1074.9519770867.

The spelling of 1242130393 in words is "one billion, two hundred forty-two million, one hundred thirty thousand, three hundred ninety-three".