11251665 has 12 divisors (see below), whose sum is σ = 19502964. Its totient is φ = 6000864.

The previous prime is 11251651. The next prime is 11251687. The reversal of 11251665 is 56615211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1272384 + 9979281 = 1128^2 + 3159^2 .

It is not a de Polignac number, because 11251665 - 2⁶ = 11251601 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124974 + ... + 125063.

It is an arithmetic number, because the mean of its divisors is an integer number (1625247).

Almost surely, 2^11251665 is an apocalyptic number.

11251665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11251665 is a deficient number, since it is larger than the sum of its proper divisors (8251299).

11251665 is a wasteful number, since it uses less digits than its factorization.

11251665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250048 (or 250045 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 11251665 is about 3354.3501606123. The cubic root of 11251665 is about 224.0812909143.

Adding to 11251665 its reverse (56615211), we get a palindrome (67866876).

The spelling of 11251665 in words is "eleven million, two hundred fifty-one thousand, six hundred sixty-five".