1270565 has 12 divisors (see below), whose sum is σ = 1572204. Its totient is φ = 985536.

The previous prime is 1270561. The next prime is 1270567. The reversal of 1270565 is 5650721.

It can be written as a sum of positive squares in 2 ways, for example, as 588289 + 682276 = 767^2 + 826^2 .

It is not a de Polignac number, because 1270565 - 2² = 1270561 is a prime.

It is a super-2 number, since 2×1270565² = 3228670838450, which contains 22 as substring.

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

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1270561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17369 + ... + 17441.

It is an arithmetic number, because the mean of its divisors is an integer number (131017).

2^1270565 is an apocalyptic number.

It is an amenable number.

1270565 is a deficient number, since it is larger than the sum of its proper divisors (301639).

1270565 is an frugal number, since it uses more digits than its factorization.

1270565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 1270565 is about 1127.1934172980. The cubic root of 1270565 is about 108.3092701321.

The spelling of 1270565 in words is "one million, two hundred seventy thousand, five hundred sixty-five".