1242520115 has 4 divisors (see below), whose sum is σ = 1491024144. Its totient is φ = 994016088.

The previous prime is 1242520063. The next prime is 1242520127. The reversal of 1242520115 is 5110252421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5110252421 = 53 ⋅96419857.

It is a cyclic number.

It is not a de Polignac number, because 1242520115 - 2¹² = 1242516019 is a prime.

It is a super-2 number, since 2×1242520115² = 3087712472359226450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124252007 + ... + 124252016.

It is an arithmetic number, because the mean of its divisors is an integer number (372756036).

Almost surely, 2^1242520115 is an apocalyptic number.

1242520115 is a deficient number, since it is larger than the sum of its proper divisors (248504029).

1242520115 is an equidigital number, since it uses as much as digits as its factorization.

1242520115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248504028.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1242520115 is about 35249.3987891992. The cubic root of 1242520115 is about 1075.0643884274.

Adding to 1242520115 its reverse (5110252421), we get a palindrome (6352772536).

The spelling of 1242520115 in words is "one billion, two hundred forty-two million, five hundred twenty thousand, one hundred fifteen".