1528642 has 4 divisors (see below), whose sum is σ = 2292966. Its totient is φ = 764320.

The previous prime is 1528633. The next prime is 1528643. The reversal of 1528642 is 2468251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2468251 = 31 ⋅79621.

It can be written as a sum of positive squares in only one way, i.e., 1413721 + 114921 = 1189^2 + 339^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1528642.

It is not an unprimeable number, because it can be changed into a prime (1528643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382159 + ... + 382162.

2^1528642 is an apocalyptic number.

1528642 is a deficient number, since it is larger than the sum of its proper divisors (764324).

1528642 is an equidigital number, since it uses as much as digits as its factorization.

1528642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764323.

The product of its digits is 3840, while the sum is 28.

The square root of 1528642 is about 1236.3826268595. The cubic root of 1528642 is about 115.1954332841.

The spelling of 1528642 in words is "one million, five hundred twenty-eight thousand, six hundred forty-two".