525441421 has 4 divisors (see below), whose sum is σ = 528665152. Its totient is φ = 522217692.

The previous prime is 525441407. The next prime is 525441437. The reversal of 525441421 is 124144525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525441421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 525441421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525441451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611621 + ... + 1611946.

It is an arithmetic number, because the mean of its divisors is an integer number (132166288).

Almost surely, 2^525441421 is an apocalyptic number.

It is an amenable number.

525441421 is a deficient number, since it is larger than the sum of its proper divisors (3223731).

525441421 is a wasteful number, since it uses less digits than its factorization.

525441421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223730.

The product of its digits is 6400, while the sum is 28.

The square root of 525441421 is about 22922.5090467863. The cubic root of 525441421 is about 806.9403553211.

Adding to 525441421 its reverse (124144525), we get a palindrome (649585946).

The spelling of 525441421 in words is "five hundred twenty-five million, four hundred forty-one thousand, four hundred twenty-one".