1261345 has 8 divisors (see below), whose sum is σ = 1520064. Its totient is φ = 1004784.

The previous prime is 1261333. The next prime is 1261357. The reversal of 1261345 is 5431621.

It is an interprime number because it is at equal distance from previous prime (1261333) and next prime (1261357).

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 1261345 - 2⁵ = 1261313 is a prime.

It is a Duffinian number.

1261345 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372 + ... + 2098.

It is an arithmetic number, because the mean of its divisors is an integer number (190008).

2^1261345 is an apocalyptic number.

It is an amenable number.

1261345 is a deficient number, since it is larger than the sum of its proper divisors (258719).

1261345 is an equidigital number, since it uses as much as digits as its factorization.

1261345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its digits is 720, while the sum is 22.

The square root of 1261345 is about 1123.0961668530. The cubic root of 1261345 is about 108.0466476587.

Adding to 1261345 its reverse (5431621), we get a palindrome (6692966).

The spelling of 1261345 in words is "one million, two hundred sixty-one thousand, three hundred forty-five".