15561485 has 8 divisors (see below), whose sum is σ = 19108320. Its totient is φ = 12159504.

The previous prime is 15561479. The next prime is 15561493. The reversal of 15561485 is 58416551.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 15561485 - 2⁸ = 15561229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35975 + ... + 36404.

It is an arithmetic number, because the mean of its divisors is an integer number (2388540).

Almost surely, 2^15561485 is an apocalyptic number.

It is an amenable number.

15561485 is a deficient number, since it is larger than the sum of its proper divisors (3546835).

15561485 is an equidigital number, since it uses as much as digits as its factorization.

15561485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72427.

The product of its digits is 24000, while the sum is 35.

The square root of 15561485 is about 3944.8048113943. The cubic root of 15561485 is about 249.6607932967.

The spelling of 15561485 in words is "fifteen million, five hundred sixty-one thousand, four hundred eighty-five".