1525243820 has 12 divisors (see below), whose sum is σ = 3203012064. Its totient is φ = 610097520.

The previous prime is 1525243813. The next prime is 1525243849. The reversal of 1525243820 is 283425251.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38131076 + ... + 38131115.

It is an arithmetic number, because the mean of its divisors is an integer number (266917672).

Almost surely, 2^1525243820 is an apocalyptic number.

1525243820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1525243820 is an abundant number, since it is smaller than the sum of its proper divisors (1677768244).

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

1525243820 is a wasteful number, since it uses less digits than its factorization.

1525243820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76262200 (or 76262198 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 1525243820 is about 39054.3700499701. The cubic root of 1525243820 is about 1151.1000991597.

The spelling of 1525243820 in words is "one billion, five hundred twenty-five million, two hundred forty-three thousand, eight hundred twenty".