242157403 has 4 divisors (see below), whose sum is σ = 242283600. Its totient is φ = 242031208.

The previous prime is 242157361. The next prime is 242157407. The reversal of 242157403 is 304751242.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242157403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242157407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60175 + ... + 64072.

It is an arithmetic number, because the mean of its divisors is an integer number (60570900).

Almost surely, 2^242157403 is an apocalyptic number.

242157403 is a deficient number, since it is larger than the sum of its proper divisors (126197).

242157403 is a wasteful number, since it uses less digits than its factorization.

242157403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126196.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 242157403 is about 15561.4074877564. The cubic root of 242157403 is about 623.3030472923.

The spelling of 242157403 in words is "two hundred forty-two million, one hundred fifty-seven thousand, four hundred three".