15320661 has 8 divisors (see below), whose sum is σ = 20475840. Its totient is φ = 10189632.

The previous prime is 15320659. The next prime is 15320663. The reversal of 15320661 is 16602351.

It is an interprime number because it is at equal distance from previous prime (15320659) and next prime (15320663).

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

It is not a de Polignac number, because 15320661 - 2¹ = 15320659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15320663) 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 7 ways as a sum of consecutive naturals, for example, 4500 + ... + 7133.

It is an arithmetic number, because the mean of its divisors is an integer number (2559480).

Almost surely, 2^15320661 is an apocalyptic number.

It is an amenable number.

15320661 is a deficient number, since it is larger than the sum of its proper divisors (5155179).

15320661 is a wasteful number, since it uses less digits than its factorization.

15320661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12075.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 15320661 is about 3914.1615960509. The cubic root of 15320661 is about 248.3662047784.

The spelling of 15320661 in words is "fifteen million, three hundred twenty thousand, six hundred sixty-one".