42020401525 has 24 divisors (see below), whose sum is σ = 55204535880. Its totient is φ = 31619266560.

The previous prime is 42020401523. The next prime is 42020401537. The reversal of 42020401525 is 52510402024.

42020401525 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 12 ways, for example, as 4013729316 + 38006672209 = 63354^2 + 194953^2 .

It is not a de Polignac number, because 42020401525 - 2¹ = 42020401523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 42020401525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020401523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 674391 + ... + 734059.

It is an arithmetic number, because the mean of its divisors is an integer number (2300188995).

Almost surely, 2^42020401525 is an apocalyptic number.

It is an amenable number.

42020401525 is a deficient number, since it is larger than the sum of its proper divisors (13184134355).

42020401525 is a wasteful number, since it uses less digits than its factorization.

42020401525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61353 (or 61348 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 42020401525 its reverse (52510402024), we get a palindrome (94530803549).

The spelling of 42020401525 in words is "forty-two billion, twenty million, four hundred one thousand, five hundred twenty-five".