15384961 has 4 divisors (see below), whose sum is σ = 15433812. Its totient is φ = 15336112.

The previous prime is 15384931. The next prime is 15384973. The reversal of 15384961 is 16948351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6864400 + 8520561 = 2620^2 + 2919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15384961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15384961.

It is not an unprimeable number, because it can be changed into a prime (15384931) 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, 23950 + ... + 24583.

It is an arithmetic number, because the mean of its divisors is an integer number (3858453).

Almost surely, 2^15384961 is an apocalyptic number.

It is an amenable number.

15384961 is a deficient number, since it is larger than the sum of its proper divisors (48851).

15384961 is an equidigital number, since it uses as much as digits as its factorization.

15384961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48850.

The product of its digits is 25920, while the sum is 37.

The square root of 15384961 is about 3922.3667600060. The cubic root of 15384961 is about 248.7131797390.

The spelling of 15384961 in words is "fifteen million, three hundred eighty-four thousand, nine hundred sixty-one".