1273345 has 8 divisors (see below), whose sum is σ = 1535976. Its totient is φ = 1013376.

The previous prime is 1273343. The next prime is 1273367. The reversal of 1273345 is 5433721.

It can be written as a sum of positive squares in 4 ways, for example, as 287296 + 986049 = 536^2 + 993^2 .

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 1273345 - 2¹ = 1273343 is a prime.

It is a super-3 number, since 3×1273345³ = 6193833357337615875, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1273343) 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, 619 + ... + 1711.

It is an arithmetic number, because the mean of its divisors is an integer number (191997).

2^1273345 is an apocalyptic number.

It is an amenable number.

1273345 is a deficient number, since it is larger than the sum of its proper divisors (262631).

1273345 is a wasteful number, since it uses less digits than its factorization.

1273345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its digits is 2520, while the sum is 25.

The square root of 1273345 is about 1128.4258947755. The cubic root of 1273345 is about 108.3882062577.

It can be divided in two parts, 12733 and 45, that multiplied together give a triangular number (572985 = T₁₀₇₀).

The spelling of 1273345 in words is "one million, two hundred seventy-three thousand, three hundred forty-five".