1525404412242 has 12 divisors (see below), whose sum is σ = 3305042893230. Its totient is φ = 508468137408.

The previous prime is 1525404412223. The next prime is 1525404412247. The reversal of 1525404412242 is 2422144045251.

1525404412242 is a `hidden beast` number, since 1 + 5 + 2 + 5 + 404 + 4 + 1 + 2 + 242 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1124552081601 + 400852330641 = 1060449^2 + 633129^2 .

It is a super-3 number, since 3×1525404412242³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1525404412197 and 1525404412206.

It is not an unprimeable number, because it can be changed into a prime (1525404412247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42372344767 + ... + 42372344802.

Almost surely, 2^{1525404412242} is an apocalyptic number.

1525404412242 is an abundant number, since it is smaller than the sum of its proper divisors (1779638480988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1525404412242 is a wasteful number, since it uses less digits than its factorization.

1525404412242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84744689577 (or 84744689574 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 36.

Adding to 1525404412242 its reverse (2422144045251), we get a palindrome (3947548457493).

The spelling of 1525404412242 in words is "one trillion, five hundred twenty-five billion, four hundred four million, four hundred twelve thousand, two hundred forty-two".