15454661 has 4 divisors (see below), whose sum is σ = 15510732. Its totient is φ = 15398592.

The previous prime is 15454639. The next prime is 15454667. The reversal of 15454661 is 16645451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16645451 = 269 ⋅61879.

It can be written as a sum of positive squares in 2 ways, for example, as 1809025 + 13645636 = 1345^2 + 3694^2 .

It is a cyclic number.

It is not a de Polignac number, because 15454661 - 2¹⁰ = 15453637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15454667) 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, 27620 + ... + 28173.

It is an arithmetic number, because the mean of its divisors is an integer number (3877683).

Almost surely, 2^15454661 is an apocalyptic number.

It is an amenable number.

15454661 is a deficient number, since it is larger than the sum of its proper divisors (56071).

15454661 is an equidigital number, since it uses as much as digits as its factorization.

15454661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56070.

The product of its digits is 14400, while the sum is 32.

The square root of 15454661 is about 3931.2416613584. The cubic root of 15454661 is about 249.0882038876.

The spelling of 15454661 in words is "fifteen million, four hundred fifty-four thousand, six hundred sixty-one".