15742047 has 4 divisors (see below), whose sum is σ = 20989400. Its totient is φ = 10494696.

The previous prime is 15742037. The next prime is 15742063. The reversal of 15742047 is 74024751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74024751 = 3 ⋅24674917.

It is not a de Polignac number, because 15742047 - 2¹⁵ = 15709279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15742037) by changing a digit.

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, 2623672 + ... + 2623677.

It is an arithmetic number, because the mean of its divisors is an integer number (5247350).

Almost surely, 2^15742047 is an apocalyptic number.

15742047 is a deficient number, since it is larger than the sum of its proper divisors (5247353).

15742047 is an equidigital number, since it uses as much as digits as its factorization.

15742047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247352.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 15742047 is about 3967.6248562585. The cubic root of 15742047 is about 250.6226983659.

Adding to 15742047 its reverse (74024751), we get a palindrome (89766798).

The spelling of 15742047 in words is "fifteen million, seven hundred forty-two thousand, forty-seven".