275857421 has 8 divisors (see below), whose sum is σ = 321214464. Its totient is φ = 231987600.

The previous prime is 275857411. The next prime is 275857441. The reversal of 275857421 is 124758572.

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 275857421 - 2⁶ = 275857357 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 (275857411) 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, 371405 + ... + 372146.

It is an arithmetic number, because the mean of its divisors is an integer number (40151808).

Almost surely, 2^275857421 is an apocalyptic number.

It is an amenable number.

275857421 is a deficient number, since it is larger than the sum of its proper divisors (45357043).

275857421 is an equidigital number, since it uses as much as digits as its factorization.

275857421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743611.

The product of its digits is 156800, while the sum is 41.

The square root of 275857421 is about 16608.9560478677. The cubic root of 275857421 is about 650.9708733920.

The spelling of 275857421 in words is "two hundred seventy-five million, eight hundred fifty-seven thousand, four hundred twenty-one".