27851421 has 8 divisors (see below), whose sum is σ = 39991840. Its totient is φ = 17139312.

The previous prime is 27851407. The next prime is 27851479. The reversal of 27851421 is 12415872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27851421 - 2⁷ = 27851293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27851821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357031 + ... + 357108.

It is an arithmetic number, because the mean of its divisors is an integer number (4998980).

Almost surely, 2^27851421 is an apocalyptic number.

It is an amenable number.

27851421 is a deficient number, since it is larger than the sum of its proper divisors (12140419).

27851421 is a wasteful number, since it uses less digits than its factorization.

27851421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714155.

The product of its digits is 4480, while the sum is 30.

The square root of 27851421 is about 5277.4445520536. Note that the first 3 decimals coincide. The cubic root of 27851421 is about 303.1208332017.

The spelling of 27851421 in words is "twenty-seven million, eight hundred fifty-one thousand, four hundred twenty-one".