1535601 has 4 divisors (see below), whose sum is σ = 2047472. Its totient is φ = 1023732.

The previous prime is 1535587. The next prime is 1535603. The reversal of 1535601 is 1065351.

It is a happy number.

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.

It is not a de Polignac number, because 1535601 - 2⁷ = 1535473 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1535603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255931 + ... + 255936.

It is an arithmetic number, because the mean of its divisors is an integer number (511868).

2^1535601 is an apocalyptic number.

It is an amenable number.

1535601 is a deficient number, since it is larger than the sum of its proper divisors (511871).

1535601 is an equidigital number, since it uses as much as digits as its factorization.

1535601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511870.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1535601 is about 1239.1936894610. The cubic root of 1535601 is about 115.3699741764.

The spelling of 1535601 in words is "one million, five hundred thirty-five thousand, six hundred one".