275401921 has 8 divisors (see below), whose sum is σ = 293733000. Its totient is φ = 257307648.

The previous prime is 275401883. The next prime is 275401927. The reversal of 275401921 is 129104572.

It can be written as a sum of positive squares in 4 ways, for example, as 47059600 + 228342321 = 6860^2 + 15111^2 .

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

It is not a de Polignac number, because 275401921 - 2¹⁹ = 274877633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275401927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56796 + ... + 61453.

It is an arithmetic number, because the mean of its divisors is an integer number (36716625).

Almost surely, 2^275401921 is an apocalyptic number.

It is an amenable number.

275401921 is a deficient number, since it is larger than the sum of its proper divisors (18331079).

275401921 is a wasteful number, since it uses less digits than its factorization.

275401921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118403.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 275401921 is about 16595.2379012776. The cubic root of 275401921 is about 650.6123783087.

The spelling of 275401921 in words is "two hundred seventy-five million, four hundred one thousand, nine hundred twenty-one".