276421 has 4 divisors (see below), whose sum is σ = 280000. Its totient is φ = 272844.

The previous prime is 276401. The next prime is 276439. The reversal of 276421 is 124672.

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 a cyclic number.

It is not a de Polignac number, because 276421 - 2⁵ = 276389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 276392 and 276401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671 + ... + 1828.

It is an arithmetic number, because the mean of its divisors is an integer number (70000).

2²⁷⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

276421 is a deficient number, since it is larger than the sum of its proper divisors (3579).

276421 is an equidigital number, since it uses as much as digits as its factorization.

276421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578.

The product of its digits is 672, while the sum is 22.

The square root of 276421 is about 525.7575486857. The cubic root of 276421 is about 65.1413884802.

The spelling of 276421 in words is "two hundred seventy-six thousand, four hundred twenty-one".