525400001 has 12 divisors (see below), whose sum is σ = 612655380. Its totient is φ = 449255520.

The previous prime is 525399949. The next prime is 525400021. The reversal of 525400001 is 100004525.

It can be written as a sum of positive squares in 2 ways, for example, as 157527601 + 367872400 = 12551^2 + 19180^2 .

It is not a de Polignac number, because 525400001 - 2⁶ = 525399937 is a prime.

It is a super-2 number, since 2×525400001² = 552090322101600002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525400021) 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 11 ways as a sum of consecutive naturals, for example, 7895 + ... + 33363.

It is an arithmetic number, because the mean of its divisors is an integer number (51054615).

Almost surely, 2^525400001 is an apocalyptic number.

It is an amenable number.

525400001 is a deficient number, since it is larger than the sum of its proper divisors (87255379).

525400001 is a wasteful number, since it uses less digits than its factorization.

525400001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25904 (or 25897 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 525400001 is about 22921.6055502227. The cubic root of 525400001 is about 806.9191513413.

Adding to 525400001 its reverse (100004525), we get a palindrome (625404526).

The spelling of 525400001 in words is "five hundred twenty-five million, four hundred thousand, one".