27400121 has 4 divisors (see below), whose sum is σ = 31314432. Its totient is φ = 23485812.

The previous prime is 27400103. The next prime is 27400133. The reversal of 27400121 is 12100472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27400121 - 2¹⁸ = 27137977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27400121.

It is not an unprimeable number, because it can be changed into a prime (27400151) 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 3 ways as a sum of consecutive naturals, for example, 1957145 + ... + 1957158.

It is an arithmetic number, because the mean of its divisors is an integer number (7828608).

Almost surely, 2^27400121 is an apocalyptic number.

It is an amenable number.

27400121 is a deficient number, since it is larger than the sum of its proper divisors (3914311).

27400121 is an equidigital number, since it uses as much as digits as its factorization.

27400121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914310.

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

The square root of 27400121 is about 5234.5124892391. The cubic root of 27400121 is about 301.4746689242.

Adding to 27400121 its reverse (12100472), we get a palindrome (39500593).

The spelling of 27400121 in words is "twenty-seven million, four hundred thousand, one hundred twenty-one".