1251065 has 8 divisors (see below), whose sum is σ = 1529928. Its totient is φ = 981760.

The previous prime is 1251053. The next prime is 1251071. The reversal of 1251065 is 5601521.

It can be written as a sum of positive squares in 4 ways, for example, as 243049 + 1008016 = 493^2 + 1004^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1251065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2096 + ... + 2625.

It is an arithmetic number, because the mean of its divisors is an integer number (191241).

2^1251065 is an apocalyptic number.

It is an amenable number.

1251065 is a deficient number, since it is larger than the sum of its proper divisors (278863).

1251065 is an equidigital number, since it uses as much as digits as its factorization.

1251065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4779.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1251065 is about 1118.5101698241. The cubic root of 1251065 is about 107.7523187899.

Adding to 1251065 its reverse (5601521), we get a palindrome (6852586).

The spelling of 1251065 in words is "one million, two hundred fifty-one thousand, sixty-five".