1270345 has 8 divisors (see below), whose sum is σ = 1577160. Its totient is φ = 981120.

The previous prime is 1270343. The next prime is 1270361. The reversal of 1270345 is 5430721.

It can be written as a sum of positive squares in 4 ways, for example, as 9216 + 1261129 = 96^2 + 1123^2 .

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

It is not a de Polignac number, because 1270345 - 2¹ = 1270343 is a prime.

It is a super-2 number, since 2×1270345² = 3227552838050, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

1270345 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1270343) 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, 4236 + ... + 4525.

It is an arithmetic number, because the mean of its divisors is an integer number (197145).

2^1270345 is an apocalyptic number.

It is an amenable number.

1270345 is a deficient number, since it is larger than the sum of its proper divisors (306815).

1270345 is an equidigital number, since it uses as much as digits as its factorization.

1270345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8795.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 1270345 is about 1127.0958255623. The cubic root of 1270345 is about 108.3030184738.

The spelling of 1270345 in words is "one million, two hundred seventy thousand, three hundred forty-five".