27121530 has 32 divisors (see below), whose sum is σ = 65743488. Its totient is φ = 7160000.

The previous prime is 27121529. The next prime is 27121547. The reversal of 27121530 is 3512172.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27121497 and 27121506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1446 + ... + 7505.

It is an arithmetic number, because the mean of its divisors is an integer number (2054484).

Almost surely, 2^27121530 is an apocalyptic number.

27121530 is an abundant number, since it is smaller than the sum of its proper divisors (38621958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27121530 is a wasteful number, since it uses less digits than its factorization.

27121530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9062.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 27121530 is about 5207.8335226848. The cubic root of 27121530 is about 300.4494374614.

The spelling of 27121530 in words is "twenty-seven million, one hundred twenty-one thousand, five hundred thirty".