1242798159 has 8 divisors (see below), whose sum is σ = 1657678000. Its totient is φ = 828225216.

The previous prime is 1242798131. The next prime is 1242798163. The reversal of 1242798159 is 9518972421.

It is a happy number.

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

It is not a de Polignac number, because 1242798159 - 2¹¹ = 1242796111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242798119) 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, 67102 + ... + 83595.

It is an arithmetic number, because the mean of its divisors is an integer number (207209750).

Almost surely, 2^1242798159 is an apocalyptic number.

1242798159 is a deficient number, since it is larger than the sum of its proper divisors (414879841).

1242798159 is a wasteful number, since it uses less digits than its factorization.

1242798159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153449.

The product of its digits is 362880, while the sum is 48.

The square root of 1242798159 is about 35253.3425223765. The cubic root of 1242798159 is about 1075.1445730204.

The spelling of 1242798159 in words is "one billion, two hundred forty-two million, seven hundred ninety-eight thousand, one hundred fifty-nine".