1242023515 has 8 divisors (see below), whose sum is σ = 1498151808. Its totient is φ = 988469760.

The previous prime is 1242023479. The next prime is 1242023527. The reversal of 1242023515 is 5153202421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242023515 - 2¹⁹ = 1241499227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242023515.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642571 + ... + 644500.

It is an arithmetic number, because the mean of its divisors is an integer number (187268976).

Almost surely, 2^1242023515 is an apocalyptic number.

1242023515 is a deficient number, since it is larger than the sum of its proper divisors (256128293).

1242023515 is a wasteful number, since it uses less digits than its factorization.

1242023515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287269.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1242023515 is about 35242.3539934551. The cubic root of 1242023515 is about 1074.9211451082.

Adding to 1242023515 its reverse (5153202421), we get a palindrome (6395225936).

The spelling of 1242023515 in words is "one billion, two hundred forty-two million, twenty-three thousand, five hundred fifteen".