525121240 has 192 divisors, whose sum is σ = 1477440000. Its totient is φ = 166973184.

The previous prime is 525121231. The next prime is 525121273. The reversal of 525121240 is 42121525.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2197041 + ... + 2197279.

It is an arithmetic number, because the mean of its divisors is an integer number (7695000).

Almost surely, 2^525121240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525121240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738720000).

525121240 is an abundant number, since it is smaller than the sum of its proper divisors (952318760).

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

525121240 is a wasteful number, since it uses less digits than its factorization.

525121240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 525121240 is about 22915.5239957545. The cubic root of 525121240 is about 806.7764173085.

Adding to 525121240 its reverse (42121525), we get a palindrome (567242765).

The spelling of 525121240 in words is "five hundred twenty-five million, one hundred twenty-one thousand, two hundred forty".