1270145 has 8 divisors (see below), whose sum is σ = 1553256. Its totient is φ = 996736.

The previous prime is 1270141. The next prime is 1270147. The reversal of 1270145 is 5410721.

It can be written as a sum of positive squares in 4 ways, for example, as 452929 + 817216 = 673^2 + 904^2 .

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 1270145 - 2² = 1270141 is a prime.

It is a super-2 number, since 2×1270145² = 3226536642050, 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 not an unprimeable number, because it can be changed into a prime (1270141) 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, 2132 + ... + 2661.

It is an arithmetic number, because the mean of its divisors is an integer number (194157).

2^1270145 is an apocalyptic number.

It is an amenable number.

1270145 is a deficient number, since it is larger than the sum of its proper divisors (283111).

1270145 is an equidigital number, since it uses as much as digits as its factorization.

1270145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1270145 is about 1127.0070984692. The cubic root of 1270145 is about 108.2973345216.

Adding to 1270145 its reverse (5410721), we get a palindrome (6680866).

The spelling of 1270145 in words is "one million, two hundred seventy thousand, one hundred forty-five".