276421345 has 8 divisors (see below), whose sum is σ = 334990440. Its totient is φ = 218947200.

The previous prime is 276421333. The next prime is 276421357. The reversal of 276421345 is 543124672.

It is an interprime number because it is at equal distance from previous prime (276421333) and next prime (276421357).

It can be written as a sum of positive squares in 4 ways, for example, as 24373969 + 252047376 = 4937^2 + 15876^2 .

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

It is not a de Polignac number, because 276421345 - 2¹⁵ = 276388577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 276421345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273180 + ... + 274189.

It is an arithmetic number, because the mean of its divisors is an integer number (41873805).

Almost surely, 2^276421345 is an apocalyptic number.

It is an amenable number.

276421345 is a deficient number, since it is larger than the sum of its proper divisors (58569095).

276421345 is a wasteful number, since it uses less digits than its factorization.

276421345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547475.

The product of its digits is 40320, while the sum is 34.

The square root of 276421345 is about 16625.9238841034. The cubic root of 276421345 is about 651.4141558110.

The spelling of 276421345 in words is "two hundred seventy-six million, four hundred twenty-one thousand, three hundred forty-five".