275877421 has 8 divisors (see below), whose sum is σ = 278407800. Its totient is φ = 273358848.

The previous prime is 275877403. The next prime is 275877443. The reversal of 275877421 is 124778572.

It can be written as a sum of positive squares in 4 ways, for example, as 146168100 + 129709321 = 12090^2 + 11389^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 275877421 - 2⁵ = 275877389 is a prime.

It is a super-2 number, since 2×275877421² = 152216702835222482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275874421) 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 7 ways as a sum of consecutive naturals, for example, 47905 + ... + 53353.

It is an arithmetic number, because the mean of its divisors is an integer number (34800975).

Almost surely, 2^275877421 is an apocalyptic number.

It is an amenable number.

275877421 is a deficient number, since it is larger than the sum of its proper divisors (2530379).

275877421 is a wasteful number, since it uses less digits than its factorization.

275877421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903.

The product of its digits is 219520, while the sum is 43.

The square root of 275877421 is about 16609.5581217563. The cubic root of 275877421 is about 650.9866050730.

The spelling of 275877421 in words is "two hundred seventy-five million, eight hundred seventy-seven thousand, four hundred twenty-one".