250421540 has 24 divisors (see below), whose sum is σ = 526424640. Its totient is φ = 100065888.

The previous prime is 250421497. The next prime is 250421557. The reversal of 250421540 is 45124052.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15371 + ... + 27149.

It is an arithmetic number, because the mean of its divisors is an integer number (21934360).

Almost surely, 2^250421540 is an apocalyptic number.

250421540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

250421540 is an abundant number, since it is smaller than the sum of its proper divisors (276003100).

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

250421540 is a wasteful number, since it uses less digits than its factorization.

250421540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12851 (or 12849 counting only the distinct ones).

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

The square root of 250421540 is about 15824.7129515830. The cubic root of 250421540 is about 630.3143975395.

Adding to 250421540 its reverse (45124052), we get a palindrome (295545592).

The spelling of 250421540 in words is "two hundred fifty million, four hundred twenty-one thousand, five hundred forty".