15135142 has 8 divisors (see below), whose sum is σ = 24766632. Its totient is φ = 6879600.

The previous prime is 15135121. The next prime is 15135143. The reversal of 15135142 is 24153151.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 687961 = 15135142 / (1 + 5 + 1 + 3 + 5 + 1 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15135143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343959 + ... + 344002.

It is an arithmetic number, because the mean of its divisors is an integer number (3095829).

Almost surely, 2^15135142 is an apocalyptic number.

15135142 is a deficient number, since it is larger than the sum of its proper divisors (9631490).

15135142 is a wasteful number, since it uses less digits than its factorization.

15135142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687974.

The product of its digits is 600, while the sum is 22.

The square root of 15135142 is about 3890.3909829219. The cubic root of 15135142 is about 247.3596360862.

Adding to 15135142 its reverse (24153151), we get a palindrome (39288293).

Subtracting 15135142 from its reverse (24153151), we obtain a square (9018009 = 3003²).

The spelling of 15135142 in words is "fifteen million, one hundred thirty-five thousand, one hundred forty-two".