13215042 has 32 divisors (see below), whose sum is σ = 29669760. Its totient is φ = 4359600.

The previous prime is 13215029. The next prime is 13215047. The reversal of 13215042 is 24051231.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (13215047) 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, 4243 + ... + 6665.

It is an arithmetic number, because the mean of its divisors is an integer number (927180).

Almost surely, 2^13215042 is an apocalyptic number.

13215042 is the 1818-th decagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13215042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14834880).

13215042 is an abundant number, since it is smaller than the sum of its proper divisors (16454718).

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

13215042 is a wasteful number, since it uses less digits than its factorization.

13215042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535 (or 2529 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13215042 is about 3635.2499226326. The cubic root of 13215042 is about 236.4228868048.

Adding to 13215042 its reverse (24051231), we get a palindrome (37266273).

The spelling of 13215042 in words is "thirteen million, two hundred fifteen thousand, forty-two".