15485661 has 12 divisors (see below), whose sum is σ = 23196992. Its totient is φ = 10323612.

The previous prime is 15485653. The next prime is 15485669. The reversal of 15485661 is 16658451.

15485661 is a `hidden beast` number, since 1 + 548 + 56 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (15485653) and next prime (15485669).

It is not a de Polignac number, because 15485661 - 2³ = 15485653 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 (15485669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31621 + ... + 32106.

Almost surely, 2^15485661 is an apocalyptic number.

It is an amenable number.

15485661 is a deficient number, since it is larger than the sum of its proper divisors (7711331).

15485661 is an frugal number, since it uses more digits than its factorization.

15485661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63742 (or 63730 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 15485661 is about 3935.1824608269. The cubic root of 15485661 is about 249.2546386208.

The spelling of 15485661 in words is "fifteen million, four hundred eighty-five thousand, six hundred sixty-one".