1533642 has 32 divisors (see below), whose sum is σ = 3525120. Its totient is φ = 439920.

The previous prime is 1533629. The next prime is 1533643. The reversal of 1533642 is 2463351.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1533643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643 + ... + 1865.

It is an arithmetic number, because the mean of its divisors is an integer number (110160).

2^1533642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1533642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762560).

1533642 is an abundant number, since it is smaller than the sum of its proper divisors (1991478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1533642 is a wasteful number, since it uses less digits than its factorization.

1533642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258.

The product of its digits is 2160, while the sum is 24.

The square root of 1533642 is about 1238.4030038723. The cubic root of 1533642 is about 115.3208932941.

Adding to 1533642 its reverse (2463351), we get a palindrome (3996993).

The spelling of 1533642 in words is "one million, five hundred thirty-three thousand, six hundred forty-two".