1242153715 has 8 divisors (see below), whose sum is σ = 1626092208. Its totient is φ = 903384480.

The previous prime is 1242153641. The next prime is 1242153719. The reversal of 1242153715 is 5173512421.

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

It is not a de Polignac number, because 1242153715 - 2¹⁵ = 1242120947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242153719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11292252 + ... + 11292361.

It is an arithmetic number, because the mean of its divisors is an integer number (203261526).

Almost surely, 2^1242153715 is an apocalyptic number.

1242153715 is a deficient number, since it is larger than the sum of its proper divisors (383938493).

1242153715 is a wasteful number, since it uses less digits than its factorization.

1242153715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22584629.

The product of its digits is 8400, while the sum is 31.

The square root of 1242153715 is about 35244.2011542325. The cubic root of 1242153715 is about 1074.9587047414.

The spelling of 1242153715 in words is "one billion, two hundred forty-two million, one hundred fifty-three thousand, seven hundred fifteen".