15445242 has 40 divisors (see below), whose sum is σ = 35150016. Its totient is φ = 5068008.

The previous prime is 15445237. The next prime is 15445247. The reversal of 15445242 is 24254451.

It is an interprime number because it is at equal distance from previous prime (15445237) and next prime (15445247).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (15445247) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10143 + ... + 11565.

Almost surely, 2^15445242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15445242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17575008).

15445242 is an abundant number, since it is smaller than the sum of its proper divisors (19704774).

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

15445242 is a wasteful number, since it uses less digits than its factorization.

15445242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504 (or 1495 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 15445242 is about 3930.0435112095. The cubic root of 15445242 is about 249.0375904926.

Adding to 15445242 its reverse (24254451), we get a palindrome (39699693).

It can be divided in two parts, 1544 and 5242, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 15445242 in words is "fifteen million, four hundred forty-five thousand, two hundred forty-two".