1528201 has 4 divisors (see below), whose sum is σ = 1530900. Its totient is φ = 1525504.

The previous prime is 1528199. The next prime is 1528223. The reversal of 1528201 is 1028251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1028251 = 7 ⋅146893.

It can be written as a sum of positive squares in 2 ways, for example, as 1071225 + 456976 = 1035^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1528201 - 2¹ = 1528199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1528291) 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, 136 + ... + 1753.

It is an arithmetic number, because the mean of its divisors is an integer number (382725).

2^1528201 is an apocalyptic number.

It is an amenable number.

1528201 is a deficient number, since it is larger than the sum of its proper divisors (2699).

1528201 is an equidigital number, since it uses as much as digits as its factorization.

1528201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1528201 is about 1236.2042711462. The cubic root of 1528201 is about 115.1843545899.

The spelling of 1528201 in words is "one million, five hundred twenty-eight thousand, two hundred one".