15242771 has 4 divisors (see below), whose sum is σ = 15250752. Its totient is φ = 15234792.

The previous prime is 15242749. The next prime is 15242789. The reversal of 15242771 is 17724251.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 15242771 - 2¹⁸ = 14980627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15242671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761 + ... + 5573.

It is an arithmetic number, because the mean of its divisors is an integer number (3812688).

Almost surely, 2^15242771 is an apocalyptic number.

15242771 is a deficient number, since it is larger than the sum of its proper divisors (7981).

15242771 is an equidigital number, since it uses as much as digits as its factorization.

15242771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7980.

The product of its digits is 3920, while the sum is 29.

The square root of 15242771 is about 3904.1991496336. The cubic root of 15242771 is about 247.9445928510.

The spelling of 15242771 in words is "fifteen million, two hundred forty-two thousand, seven hundred seventy-one".