27741021 has 16 divisors (see below), whose sum is σ = 46115328. Its totient is φ = 14410800.

The previous prime is 27741017. The next prime is 27741029. The reversal of 27741021 is 12014772.

It is not a de Polignac number, because 27741021 - 2² = 27741017 is a prime.

It is a super-2 number, since 2×27741021² = 1539128492244882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27740982 and 27741000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27741029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59815 + ... + 60276.

It is an arithmetic number, because the mean of its divisors is an integer number (2882208).

Almost surely, 2^27741021 is an apocalyptic number.

27741021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27741021 is a deficient number, since it is larger than the sum of its proper divisors (18374307).

27741021 is a wasteful number, since it uses less digits than its factorization.

27741021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120112.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 27741021 is about 5266.9745585108. The cubic root of 27741021 is about 302.7197901787.

Adding to 27741021 its reverse (12014772), we get a palindrome (39755793).

The spelling of 27741021 in words is "twenty-seven million, seven hundred forty-one thousand, twenty-one".