1525521 has 8 divisors (see below), whose sum is σ = 2122560. Its totient is φ = 972752.

The previous prime is 1525507. The next prime is 1525561. The reversal of 1525521 is 1255251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1525521 - 2¹⁸ = 1263377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1525501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10986 + ... + 11123.

It is an arithmetic number, because the mean of its divisors is an integer number (265320).

2^1525521 is an apocalyptic number.

It is an amenable number.

1525521 is a deficient number, since it is larger than the sum of its proper divisors (597039).

1525521 is a wasteful number, since it uses less digits than its factorization.

1525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22135.

The product of its digits is 500, while the sum is 21.

The square root of 1525521 is about 1235.1198322430. The cubic root of 1525521 is about 115.1169824099.

The spelling of 1525521 in words is "one million, five hundred twenty-five thousand, five hundred twenty-one".