15535242 has 24 divisors (see below), whose sum is σ = 34821540. Its totient is φ = 4999680.

The previous prime is 15535211. The next prime is 15535253. The reversal of 15535242 is 24253551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15046641 + 488601 = 3879^2 + 699^2 .

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 in 11 ways as a sum of consecutive naturals, for example, 14359 + ... + 15402.

Almost surely, 2^15535242 is an apocalyptic number.

15535242 is an abundant number, since it is smaller than the sum of its proper divisors (19286298).

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

15535242 is a wasteful number, since it uses less digits than its factorization.

15535242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29798 (or 29795 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 15535242 is about 3941.4771342734. The cubic root of 15535242 is about 249.5203710795.

Adding to 15535242 its reverse (24253551), we get a palindrome (39788793).

The spelling of 15535242 in words is "fifteen million, five hundred thirty-five thousand, two hundred forty-two".