525400421 has 8 divisors (see below), whose sum is σ = 646646784. Its totient is φ = 415701360.

The previous prime is 525400411. The next prime is 525400429. The reversal of 525400421 is 124004525.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 525400421 - 2¹⁰ = 525399397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525400429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2886725 + ... + 2886906.

It is an arithmetic number, because the mean of its divisors is an integer number (80830848).

Almost surely, 2^525400421 is an apocalyptic number.

It is an amenable number.

525400421 is a deficient number, since it is larger than the sum of its proper divisors (121246363).

525400421 is a wasteful number, since it uses less digits than its factorization.

525400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773651.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 525400421 is about 22921.6147118828. The cubic root of 525400421 is about 806.9193663559.

Adding to 525400421 its reverse (124004525), we get a palindrome (649404946).

The spelling of 525400421 in words is "five hundred twenty-five million, four hundred thousand, four hundred twenty-one".