27121765 has 8 divisors (see below), whose sum is σ = 35504928. Its totient is φ = 19724880.

The previous prime is 27121751. The next prime is 27121781. The reversal of 27121765 is 56712172.

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

It is not a de Polignac number, because 27121765 - 2¹⁷ = 26990693 is a prime.

It is a Duffinian number.

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, 246507 + ... + 246616.

It is an arithmetic number, because the mean of its divisors is an integer number (4438116).

Almost surely, 2^27121765 is an apocalyptic number.

It is an amenable number.

27121765 is a deficient number, since it is larger than the sum of its proper divisors (8383163).

27121765 is a wasteful number, since it uses less digits than its factorization.

27121765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493139.

The product of its digits is 5880, while the sum is 31.

The square root of 27121765 is about 5207.8560848011. The cubic root of 27121765 is about 300.4503052273.

The spelling of 27121765 in words is "twenty-seven million, one hundred twenty-one thousand, seven hundred sixty-five".