42405402525261 has 16 divisors (see below), whose sum is σ = 57600765957888. Its totient is φ = 27742304289600.

The previous prime is 42405402525259. The next prime is 42405402525307. The reversal of 42405402525261 is 16252520450424.

It is a happy number.

42405402525261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42405402525261 - 2¹ = 42405402525259 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42405402525461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268741906 + ... + 268899651.

It is an arithmetic number, because the mean of its divisors is an integer number (3600047872368).

Almost surely, 2^{42405402525261} is an apocalyptic number.

It is an amenable number.

42405402525261 is a deficient number, since it is larger than the sum of its proper divisors (15195363432627).

42405402525261 is a wasteful number, since it uses less digits than its factorization.

42405402525261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537642052.

The product of its (nonzero) digits is 768000, while the sum is 42.

Adding to 42405402525261 its reverse (16252520450424), we get a palindrome (58657922975685).

The spelling of 42405402525261 in words is "forty-two trillion, four hundred five billion, four hundred two million, five hundred twenty-five thousand, two hundred sixty-one".