1525001000 has 64 divisors (see below), whose sum is σ = 3574359360. Its totient is φ = 609000000.

The previous prime is 1525000973. The next prime is 1525001033. The reversal of 1525001000 is 1005251.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1050275 + ... + 1051725.

It is an arithmetic number, because the mean of its divisors is an integer number (55849365).

Almost surely, 2^1525001000 is an apocalyptic number.

1525001000 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 1525001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787179680).

1525001000 is an abundant number, since it is smaller than the sum of its proper divisors (2049358360).

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

1525001000 is a wasteful number, since it uses less digits than its factorization.

1525001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523 (or 2509 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 1525001000 is about 39051.2611832192. The cubic root of 1525001000 is about 1151.0390105747.

Adding to 1525001000 its reverse (1005251), we get a palindrome (1526006251).

The spelling of 1525001000 in words is "one billion, five hundred twenty-five million, one thousand".