1251361 has 8 divisors (see below), whose sum is σ = 1338624. Its totient is φ = 1166880.

The previous prime is 1251329. The next prime is 1251409. The reversal of 1251361 is 1631521.

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 1251361 - 2⁵ = 1251329 is a prime.

It is a Duffinian number.

1251361 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1251301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (167328).

2^1251361 is an apocalyptic number.

It is an amenable number.

1251361 is a deficient number, since it is larger than the sum of its proper divisors (87263).

1251361 is a wasteful number, since it uses less digits than its factorization.

1251361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its digits is 180, while the sum is 19.

The square root of 1251361 is about 1118.6424808669. The cubic root of 1251361 is about 107.7608161292.

Adding to 1251361 its reverse (1631521), we get a palindrome (2882882).

The spelling of 1251361 in words is "one million, two hundred fifty-one thousand, three hundred sixty-one".