42450421225 has 27 divisors (see below), whose sum is σ = 53351842053. Its totient is φ = 33506235840.

The previous prime is 42450421219. The next prime is 42450421253. The reversal of 42450421225 is 52212405424.

The square root of 42450421225 is 206035.

It is a perfect power (a square), and thus also a powerful number.

42450421225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8833932121 + 33616489104 = 93989^2 + 183348^2 .

It is not a de Polignac number, because 42450421225 - 2¹⁷ = 42450290153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 91685344 + ... + 91685806.

Almost surely, 2^42450421225 is an apocalyptic number.

42450421225 is the 206035-th square number.

42450421225 is the 103018-th centered octagonal number.

It is an amenable number.

42450421225 is a deficient number, since it is larger than the sum of its proper divisors (10901420828).

42450421225 is an frugal number, since it uses more digits than its factorization.

42450421225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

Adding to 42450421225 its reverse (52212405424), we get a palindrome (94662826649).

The spelling of 42450421225 in words is "forty-two billion, four hundred fifty million, four hundred twenty-one thousand, two hundred twenty-five".