1525040020 has 96 divisors (see below), whose sum is σ = 3809369088. Its totient is φ = 501975552.

The previous prime is 1525039993. The next prime is 1525040039. The reversal of 1525040020 is 200405251.

It is a self number, because there is not a number n which added to its sum of digits gives 1525040020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346554 + ... + 350926.

It is an arithmetic number, because the mean of its divisors is an integer number (39680928).

Almost surely, 2^1525040020 is an apocalyptic number.

1525040020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1525040020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904684544).

1525040020 is an abundant number, since it is smaller than the sum of its proper divisors (2284329068).

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

1525040020 is a wasteful number, since it uses less digits than its factorization.

1525040020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489 (or 4487 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1525040020 is about 39051.7607797651. The cubic root of 1525040020 is about 1151.0488276522.

Adding to 1525040020 its reverse (200405251), we get a palindrome (1725445271).

The spelling of 1525040020 in words is "one billion, five hundred twenty-five million, forty thousand, twenty".