242154247 has 4 divisors (see below), whose sum is σ = 242266176. Its totient is φ = 242042320.

The previous prime is 242154229. The next prime is 242154257. The reversal of 242154247 is 742451242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242154247 - 2⁷ = 242154119 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242154257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52654 + ... + 57067.

It is an arithmetic number, because the mean of its divisors is an integer number (60566544).

Almost surely, 2^242154247 is an apocalyptic number.

242154247 is a deficient number, since it is larger than the sum of its proper divisors (111929).

242154247 is a wasteful number, since it uses less digits than its factorization.

242154247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111928.

The product of its digits is 17920, while the sum is 31.

The square root of 242154247 is about 15561.3060827168. The cubic root of 242154247 is about 623.3003394765.

The spelling of 242154247 in words is "two hundred forty-two million, one hundred fifty-four thousand, two hundred forty-seven".