245235405242 has 4 divisors (see below), whose sum is σ = 367853107866. Its totient is φ = 122617702620.

The previous prime is 245235405187. The next prime is 245235405251. The reversal of 245235405242 is 242504532542.

245235405242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242504532542 = 2 ⋅121252266271.

It can be written as a sum of positive squares in only one way, i.e., 148526222881 + 96709182361 = 385391^2 + 310981^2 .

It is a super-2 number, since 2×245235405242² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 245235405196 and 245235405205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61308851309 + ... + 61308851312.

Almost surely, 2^245235405242 is an apocalyptic number.

245235405242 is a deficient number, since it is larger than the sum of its proper divisors (122617702624).

245235405242 is a wasteful number, since it uses less digits than its factorization.

245235405242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122617702623.

The product of its (nonzero) digits is 384000, while the sum is 38.

Adding to 245235405242 its reverse (242504532542), we get a palindrome (487739937784).

The spelling of 245235405242 in words is "two hundred forty-five billion, two hundred thirty-five million, four hundred five thousand, two hundred forty-two".