1525001 has 4 divisors (see below), whose sum is σ = 1527504. Its totient is φ = 1522500.

The previous prime is 1524989. The next prime is 1525021. The reversal of 1525001 is 1005251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1525001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1525021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (381876).

2^1525001 is an apocalyptic number.

It is an amenable number.

1525001 is a deficient number, since it is larger than the sum of its proper divisors (2503).

1525001 is a wasteful number, since it uses less digits than its factorization.

1525001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502.

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

The square root of 1525001 is about 1234.9093084109. The cubic root of 1525001 is about 115.1039010575.

The spelling of 1525001 in words is "one million, five hundred twenty-five thousand, one".