242421940 has 12 divisors (see below), whose sum is σ = 509086116. Its totient is φ = 96968768.

The previous prime is 242421937. The next prime is 242421967. The reversal of 242421940 is 49124242.

It can be written as a sum of positive squares in 2 ways, for example, as 173132964 + 69288976 = 13158^2 + 8324^2 .

It is a junction number, because it is equal to n+sod(n) for n = 242421899 and 242421908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6060529 + ... + 6060568.

It is an arithmetic number, because the mean of its divisors is an integer number (42423843).

Almost surely, 2^242421940 is an apocalyptic number.

242421940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242421940 is an abundant number, since it is smaller than the sum of its proper divisors (266664176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242421940 is a wasteful number, since it uses less digits than its factorization.

242421940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12121106 (or 12121104 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 242421940 is about 15569.9049451177. The cubic root of 242421940 is about 623.5299337594.

The spelling of 242421940 in words is "two hundred forty-two million, four hundred twenty-one thousand, nine hundred forty".