1525642 has 4 divisors (see below), whose sum is σ = 2288466. Its totient is φ = 762820.

The previous prime is 1525639. The next prime is 1525669. The reversal of 1525642 is 2465251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 251001 = 1129^2 + 501^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381409 + ... + 381412.

2^1525642 is an apocalyptic number.

1525642 is a deficient number, since it is larger than the sum of its proper divisors (762824).

1525642 is an equidigital number, since it uses as much as digits as its factorization.

1525642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762823.

The product of its digits is 2400, while the sum is 25.

The square root of 1525642 is about 1235.1688143732. The cubic root of 1525642 is about 115.1200259137.

The spelling of 1525642 in words is "one million, five hundred twenty-five thousand, six hundred forty-two".