11251681 has 16 divisors (see below), whose sum is σ = 13622400. Its totient is φ = 9088128.

The previous prime is 11251651. The next prime is 11251687. The reversal of 11251681 is 18615211.

It is a happy number.

It is not a de Polignac number, because 11251681 - 2¹¹ = 11249633 is a prime.

It is a super-2 number, since 2×11251681² = 253200650651522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11251687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8085 + ... + 9373.

It is an arithmetic number, because the mean of its divisors is an integer number (851400).

Almost surely, 2^11251681 is an apocalyptic number.

It is an amenable number.

11251681 is a deficient number, since it is larger than the sum of its proper divisors (2370719).

11251681 is a wasteful number, since it uses less digits than its factorization.

11251681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368.

The product of its digits is 480, while the sum is 25.

The square root of 11251681 is about 3354.3525455742. The cubic root of 11251681 is about 224.0813971296.

Adding to 11251681 its reverse (18615211), we get a palindrome (29866892).

The spelling of 11251681 in words is "eleven million, two hundred fifty-one thousand, six hundred eighty-one".