1242345215 has 16 divisors (see below), whose sum is σ = 1532312640. Its totient is φ = 966577920.

The previous prime is 1242345211. The next prime is 1242345217. The reversal of 1242345215 is 5125432421.

It is not a de Polignac number, because 1242345215 - 2² = 1242345211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242345211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4262 + ... + 50028.

It is an arithmetic number, because the mean of its divisors is an integer number (95769540).

Almost surely, 2^1242345215 is an apocalyptic number.

1242345215 is a deficient number, since it is larger than the sum of its proper divisors (289967425).

1242345215 is an equidigital number, since it uses as much as digits as its factorization.

1242345215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45922.

The product of its digits is 9600, while the sum is 29.

The square root of 1242345215 is about 35246.9178085120. The cubic root of 1242345215 is about 1075.0139432120.

Adding to 1242345215 its reverse (5125432421), we get a palindrome (6367777636).

The spelling of 1242345215 in words is "one billion, two hundred forty-two million, three hundred forty-five thousand, two hundred fifteen".