242345405 has 4 divisors (see below), whose sum is σ = 290814492. Its totient is φ = 193876320.

The previous prime is 242345401. The next prime is 242345407. The reversal of 242345405 is 504543242.

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

It can be written as a sum of positive squares in 2 ways, for example, as 178008964 + 64336441 = 13342^2 + 8021^2 .

It is not a de Polignac number, because 242345405 - 2² = 242345401 is a prime.

It is a super-2 number, since 2×242345405² = 117462590649228050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242345401) 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, 24234536 + ... + 24234545.

It is an arithmetic number, because the mean of its divisors is an integer number (72703623).

Almost surely, 2^242345405 is an apocalyptic number.

It is an amenable number.

242345405 is a deficient number, since it is larger than the sum of its proper divisors (48469087).

242345405 is an equidigital number, since it uses as much as digits as its factorization.

242345405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48469086.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 242345405 is about 15567.4469647402. The cubic root of 242345405 is about 623.4643086673.

Adding to 242345405 its reverse (504543242), we get a palindrome (746888647).

The spelling of 242345405 in words is "two hundred forty-two million, three hundred forty-five thousand, four hundred five".