27121400 has 24 divisors (see below), whose sum is σ = 63057720. Its totient is φ = 10848480.

The previous prime is 27121321. The next prime is 27121403. The reversal of 27121400 is 412172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27121403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67604 + ... + 68003.

It is an arithmetic number, because the mean of its divisors is an integer number (2627405).

Almost surely, 2^27121400 is an apocalyptic number.

27121400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27121400 is an abundant number, since it is smaller than the sum of its proper divisors (35936320).

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

27121400 is a wasteful number, since it uses less digits than its factorization.

27121400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135623 (or 135614 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 27121400 is about 5207.8210414721. The cubic root of 27121400 is about 300.4489574186.

Adding to 27121400 its reverse (412172), we get a palindrome (27533572).

The spelling of 27121400 in words is "twenty-seven million, one hundred twenty-one thousand, four hundred".