1242053017 has 4 divisors (see below), whose sum is σ = 1243973376. Its totient is φ = 1240132660.

The previous prime is 1242052957. The next prime is 1242053063. The reversal of 1242053017 is 7103502421.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242053017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242052982 and 1242053000.

It is not an unprimeable number, because it can be changed into a prime (1242053717) 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, 959209 + ... + 960502.

It is an arithmetic number, because the mean of its divisors is an integer number (310993344).

Almost surely, 2^1242053017 is an apocalyptic number.

It is an amenable number.

1242053017 is a deficient number, since it is larger than the sum of its proper divisors (1920359).

1242053017 is an equidigital number, since it uses as much as digits as its factorization.

1242053017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920358.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1242053017 is about 35242.7725498435. The cubic root of 1242053017 is about 1074.9296559703.

Adding to 1242053017 its reverse (7103502421), we get a palindrome (8345555438).

The spelling of 1242053017 in words is "one billion, two hundred forty-two million, fifty-three thousand, seventeen".