15073661 has 4 divisors (see below), whose sum is σ = 15093372. Its totient is φ = 15053952.

The previous prime is 15073637. The next prime is 15073687. The reversal of 15073661 is 16637051.

15073661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11764900 + 3308761 = 3430^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 15073661 - 2¹⁴ = 15057277 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 (15073621) 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, 8660 + ... + 10253.

It is an arithmetic number, because the mean of its divisors is an integer number (3773343).

Almost surely, 2^15073661 is an apocalyptic number.

It is an amenable number.

15073661 is a deficient number, since it is larger than the sum of its proper divisors (19711).

15073661 is an equidigital number, since it uses as much as digits as its factorization.

15073661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19710.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 15073661 is about 3882.4812942241. The cubic root of 15073661 is about 247.0242454086.

The spelling of 15073661 in words is "fifteen million, seventy-three thousand, six hundred sixty-one".