1242165115 has 16 divisors (see below), whose sum is σ = 1528450560. Its totient is φ = 968668000.

The previous prime is 1242165107. The next prime is 1242165157. The reversal of 1242165115 is 5115612421.

It is not a de Polignac number, because 1242165115 - 2³ = 1242165107 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48456 + ... + 69514.

It is an arithmetic number, because the mean of its divisors is an integer number (95528160).

Almost surely, 2^1242165115 is an apocalyptic number.

1242165115 is a deficient number, since it is larger than the sum of its proper divisors (286285445).

1242165115 is a wasteful number, since it uses less digits than its factorization.

1242165115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21362.

The product of its digits is 2400, while the sum is 28.

The square root of 1242165115 is about 35244.3628825944. The cubic root of 1242165115 is about 1074.9619932480.

Adding to 1242165115 its reverse (5115612421), we get a palindrome (6357777536).

The spelling of 1242165115 in words is "one billion, two hundred forty-two million, one hundred sixty-five thousand, one hundred fifteen".