1525243420 has 24 divisors (see below), whose sum is σ = 3234728448. Its totient is φ = 604056000.

The previous prime is 1525243399. The next prime is 1525243453. The reversal of 1525243420 is 243425251.

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 7 ways as a sum of consecutive naturals, for example, 375516 + ... + 379555.

It is an arithmetic number, because the mean of its divisors is an integer number (134780352).

Almost surely, 2^1525243420 is an apocalyptic number.

1525243420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1525243420 is an abundant number, since it is smaller than the sum of its proper divisors (1709485028).

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

1525243420 is a wasteful number, since it uses less digits than its factorization.

1525243420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755181 (or 755179 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1525243420 is about 39054.3649289039. The cubic root of 1525243420 is about 1151.0999985331.

Adding to 1525243420 its reverse (243425251), we get a palindrome (1768668671).

The spelling of 1525243420 in words is "one billion, five hundred twenty-five million, two hundred forty-three thousand, four hundred twenty".