242137405 has 8 divisors (see below), whose sum is σ = 293830200. Its totient is φ = 191533056.

The previous prime is 242137393. The next prime is 242137411. The reversal of 242137405 is 504731242.

It can be written as a sum of positive squares in 4 ways, for example, as 925444 + 241211961 = 962^2 + 15531^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 242137405 - 2¹⁷ = 242006333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271620 + ... + 272509.

It is an arithmetic number, because the mean of its divisors is an integer number (36728775).

Almost surely, 2^242137405 is an apocalyptic number.

It is an amenable number.

242137405 is a deficient number, since it is larger than the sum of its proper divisors (51692795).

242137405 is an equidigital number, since it uses as much as digits as its factorization.

242137405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544223.

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

The square root of 242137405 is about 15560.7649233577. The cubic root of 242137405 is about 623.2858888142.

Adding to 242137405 its reverse (504731242), we get a palindrome (746868647).

The spelling of 242137405 in words is "two hundred forty-two million, one hundred thirty-seven thousand, four hundred five".