27121261 has 8 divisors (see below), whose sum is σ = 27942464. Its totient is φ = 26308800.

The previous prime is 27121229. The next prime is 27121291. The reversal of 27121261 is 16212172.

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 27121261 - 2⁵ = 27121229 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 (27121201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4405 + ... + 8581.

It is an arithmetic number, because the mean of its divisors is an integer number (3492808).

Almost surely, 2^27121261 is an apocalyptic number.

It is an amenable number.

27121261 is a deficient number, since it is larger than the sum of its proper divisors (821203).

27121261 is a wasteful number, since it uses less digits than its factorization.

27121261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371.

The product of its digits is 336, while the sum is 22.

The square root of 27121261 is about 5207.8076961424. The cubic root of 27121261 is about 300.4484441403.

The spelling of 27121261 in words is "twenty-seven million, one hundred twenty-one thousand, two hundred sixty-one".