27021069 has 12 divisors (see below), whose sum is σ = 40376700. Its totient is φ = 17392704.

The previous prime is 27021061. The next prime is 27021077. The reversal of 27021069 is 96012072.

Added to its reverse (96012072) it gives a triangular number (123033141 = T₁₅₆₈₆).

It is an interprime number because it is at equal distance from previous prime (27021061) and next prime (27021077).

It can be written as a sum of positive squares in 2 ways, for example, as 6200100 + 20820969 = 2490^2 + 4563^2 .

It is not a de Polignac number, because 27021069 - 2³ = 27021061 is a prime.

It is a super-2 number, since 2×27021069² = 1460276339805522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27021061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51504 + ... + 52025.

It is an arithmetic number, because the mean of its divisors is an integer number (3364725).

Almost surely, 2^27021069 is an apocalyptic number.

27021069 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

27021069 is a deficient number, since it is larger than the sum of its proper divisors (13355631).

27021069 is a wasteful number, since it uses less digits than its factorization.

27021069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103564 (or 103561 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 27021069 is about 5198.1793928259. The cubic root of 27021069 is about 300.0780130448.

Adding to 27021069 its reverse (96012072), we get a triangular number (123033141 = T₁₅₆₈₆).

The spelling of 27021069 in words is "twenty-seven million, twenty-one thousand, sixty-nine".