15520142 has 8 divisors (see below), whose sum is σ = 25396632. Its totient is φ = 7054600.

The previous prime is 15520139. The next prime is 15520151. The reversal of 15520142 is 24102551.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352709 + ... + 352752.

It is an arithmetic number, because the mean of its divisors is an integer number (3174579).

Almost surely, 2^15520142 is an apocalyptic number.

15520142 is a deficient number, since it is larger than the sum of its proper divisors (9876490).

15520142 is a wasteful number, since it uses less digits than its factorization.

15520142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705474.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 15520142 is about 3939.5611430716. The cubic root of 15520142 is about 249.4395016388.

Adding to 15520142 its reverse (24102551), we get a palindrome (39622693).

The spelling of 15520142 in words is "fifteen million, five hundred twenty thousand, one hundred forty-two".