1251145 has 8 divisors (see below), whose sum is σ = 1715904. Its totient is φ = 857904.

The previous prime is 1251121. The next prime is 1251157. The reversal of 1251145 is 5411521.

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 1251145 - 2¹⁷ = 1120073 is a prime.

It is a super-2 number, since 2×1251145² = 3130727622050, which contains 22 as substring.

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, 17839 + ... + 17908.

It is an arithmetic number, because the mean of its divisors is an integer number (214488).

2^1251145 is an apocalyptic number.

It is an amenable number.

1251145 is a deficient number, since it is larger than the sum of its proper divisors (464759).

1251145 is an equidigital number, since it uses as much as digits as its factorization.

1251145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35759.

The product of its digits is 200, while the sum is 19.

The square root of 1251145 is about 1118.5459311088. The cubic root of 1251145 is about 107.7546155002.

Adding to 1251145 its reverse (5411521), we get a palindrome (6662666).

The spelling of 1251145 in words is "one million, two hundred fifty-one thousand, one hundred forty-five".